Say Ohm: Japanese Electric Bread and the Joy of Panko

By Nathan Hopson

In 1998, the New York Times introduced readers to an exotic new ingredient described as “a light, airy variety [of breadcrumb] worlds away from the acrid, herb-flecked, additive-laden bread crumbs in the supermarket,” with a texture “more like crushed cornflakes or potato chips” than its plebeian brethren (Fabricant 1998). That ingredient was panko, which has since become a staple for American home and professional cooks alike. In 2007, panko accounted for only 3% of US breadcrumb sales, for instance. Five years later, one in six American households regularly stocked panko in the pantry. Panko caught on because it is crunchier (and stays crunchy under restaurant heat lamps), absorbs less oil, and adds more volume than traditional breadcrumbs (Nassauer 2013).

Why are these Japanese breadcrumbs different? How did they get to be that way? The story told by American manufacturers such as LA-based Upper Crust Enterprises―an ironic name given that the secret to panko is crust-free bread―is that “Japanese soldiers during World War II discovered [that] crustless bread made for better breadcrumbs as they cooked it with electricity from tank batteries, not wanting to draw the enemy’s attention with smoke from a fire”(Nassauer 2013). Upper Crust’s president, Gary Kawaguchi, affirmed this account in a recent interview.

This is a cool story. Turns out, the truth is just as cool.

Japanese inventors had tinkered with electric cooking prototypes since at least the 1920s. Then in 1933, the Imperial Japanese Army (IJA) commissioned a “field kitchen that can prepare both rice and bread”(Aoki 2019, 11). Cost was no object and time was of the essence. As Katarzyna Cwiertka has noted, the military generally advocated bread, but there was a special urgency in light of the logistical difficulties of supplying rice to new front lines in Siberia and Manchuria. In 1937, paymaster captain Akutsu Shōzō’s design became the “Type 97” field kitchen, first deployed with the IJA’s First Independent Mixed Brigade that year (Uchida 2020, 2–4). The 97’s cooker was an insulated wooden box with electrode plates attached to the base and four sides of the interior. The highly efficient cooking process Akutsu used goes by several names, including ohmic and Joule heating. It is a form of electroconductive heating that passes electric current through foods to heat them rapidly and uniformly, quickly producing a light, yeasty, crust-free bread.

Figure 1: Type 97 field kitchen interior structure. Courtesy of JACAR.

After the war, companies such as Sony began selling rice cookers and bread machines that adapted these wartime technologies, and DIY home bread makers were showcased in magazines and newspapers. Influential women’s magazine Shufu no tomo and the inaugural issue of boys’ DIY magazine Shōnen kōsaku both featured instructions for bread makers derived from Akutsu’s design in 1946, reflecting the popularity of electric power in light of consumer fuel shortages and, conversely, excess generating capacity with military factories shut down (Uchida and Aoki 2019, 484).

In the 1960s, the new postwar frozen food industry hungered for high-quality breadcrumbs. Wheat had poured into Japan after 1945, the result of food aid; the use of bread and other wheat products in Japan’s school lunch program; and endless marketing promotions. Although ambitious American visions to recenter the national diet on wheat were soon abandoned, US agricultural imports and food technologies remained critical to Japan’s changing postwar food systems. Improved and upscaled food processing equipment met a market awash in cheap wheat, enthusiastic consumers (about half of whom owned electric refrigerators by the mid-1960s), and improved logistics. Frozen foods were among the shiny new things of postwar Japan’s shiny new “bright life,” and the mass use of frozen foods to cater the 1964 Olympiad and 1970 World’s Fair made them even more attractive symbols of Japan reborn.

These factors spurred rapid growth in breadcrumb demand, which was met in large part by the industrial-scale use of ohmic heating to create “electric breads” that were airy and uniform, and fried up crisply and uniformly when made into panko (Uchida and Aoki 2019, 485).


Sources Cited

Aoki Takashi. 2019. “Denkyokushiki chōri no hatsumei kara panko e tsuzuku rekishi oyobi saigen jikken.” Science Journal of Kanagawa University, no. 30 (June): 9–16.

Fabricant, Florence. 1998. “From Japan, the Secret of Crunchy Coating.” New York Times, December 1998.

Nassauer, Sarah. 2013. “Panko Tries to Find a Place in Every Pantry.” Dow Jones Institutional News, March 7, 2013.

Uchida Takashi. 2020. “Suihan o kigen to shi panko seizō ni tsuzuku denki pan no rekishi (1): Rikugun suiji jidōsha to Kōseishiki denki suihanki to Takara ohachi.” Tōkyō Yakka Daigaku kenkyū kiyō, no. 23 (March): 1–14.

Uchida Takashi, and Aoki Takashi. 2019. “Suihan, denki pan, pan seizō ni itaru Nihon no denkyokushiki chōri no rekishi: Rikugun ‘suiji jidōsha’ o kigen to suru denki pan jikken.” Nihon Yakugaku Kyōiku Gakkai ronbunshū, no. 43: 483–86.


This post is part five in an ongoing series by Hopson on the history of nutrition in modern Japan. You can read his previous post here.

Meals on Wheels: The “Kitchen Cars” and American Recipes for the Postwar Japanese Diet

By Nathan Hopson

From 1956 to 1960, the USDA Foreign Agricultural Service (FAS) sponsored a fleet of food demonstration buses in Japan (“kitchen cars”) to improve national nutrition and fuel the nation’s economic recovery with more “modern” and “rational” cooking methods and, most importantly, ingredients (i.e. American agricultural surpluses: wheat, corn, soy, and to a lesser extent meat, dairy, etc.) The concept was first floated to the US by Dr. Ōiso Toshio, chief of the health ministry’s nutrition section, 1953-1963. Along with the school lunch program instituted under the US occupation, the kitchen cars became one of the most important tools for marketing American farm products in Japan. The school lunch program, centered on bread and (reconstituted skim) milk until the 1970s, taught young Japanese new tastes. The kitchen cars taught their mothers to reproduce those flavors at home.

The initial fleet of a dozen buses, operated by the Japan Nutrition Association (a semiprivate organ of the health ministry), reached over two million people in towns, villages, and apartment blocks across Japan. The nutritionists staffing the buses put their professional imprimatur on the many novel foods they demonstrated, and distributed samples, nutritional pamphlets, and the day’s recipes to their audiences of mostly housewives. The kitchen cars were wildly popular. When US funding expired, local Japanese governments built their own to meet public demand; the number exceeded 100 by the end of the 1960s. Though it is difficult (impossible?) to quantify, the kitchen cars contributed in subtle but profound ways to transforming the postwar Japanese diet.

Despite their popularity at the time, today the kitchen cars are mostly forgotten. When they are remembered, it is mostly for destroying “traditional” Japanese dietary patterns and contributing to the “Westernization” of the diet during the period of high economic growth. This backlash stems in part from the fact that American financing was hidden not just from the public, but also from all those who staffed or assisted with the kitchen cars. Still, in the short run, these buses were a win-win for the US and Japan. America’s Cold War “Food for Peace” campaign put agricultural surplus to work supporting a critical ally, and Japan received enormous amounts of free or cheap food and generous development loans.

Figure 1: Kitchen car demonstration in rural Aomori, year unknown (probably 1950s). Courtesy of the Aomori Prefectural Museum.

The photo above shows a typical scene from a day in the life of the kitchen car. The audience crowds around the back of bus, which opens up like a thrust stage for the nutritionists to perform upon. The gathered women listen intently, some taking notes. The kitchen installed in the rear of the bus is the state-of-the-art chrome and gadgetry emblematic of the new postwar “bright life” of happy consumerism. The nutritionists in their white lab coats bring the authority of science. The foods they are preparing may not seem like the stuff of American farm surplus propaganda, but as Ōiso himself observed, “Propaganda is truly effective when people don’t notice it.”[1] To wit, the noodles are most likely soba: buckwheat mixed with (American) wheat. Even subtler is the use of sautéing, undoubtedly in (American) corn or soy oil. This kind of gradualist approach, expressed in slogans such as “Flour-based food once a day,” helps explain both why nobody suspected American involvement and why the kitchen cars were so popular and effective.

Few detailed records of 1950s’ kitchen car menus remain, but those that do are consistent with accounts from the 1960s. A list of favorites from mid-decade Okayama prefecture includes milk donuts, udon stew, sautéed amaranth leaves with liver, fried meat and vegetables with ketchup, vegetable cream soup, fried soybean fritters, chicken and peanuts in tomato sauce, bok choy with peanuts and mushrooms, and cheese sponge cake. Roughly simultaneously, the prefecture’s public health center sponsored competitions for original, tasty, nutritious, economical foods (about ¥20 each) using ingredients like soy, skim milk, and flour. Winners included vegetable omelets, fried tofu-wrapped sardines, fried sardine balls, and mysterious entries such as “nutritional bread” and “nutritional fried dumplings.”

These lists lend credence to the remarks of Richard Baum, Ōiso’s initial American collaborator. In a 1978 documentary, Baum expressed immense satisfaction at the kitchen cars’ success. As he explained, “the housewives would come out and gather around and learn how to make different wheat foods. And then they would get to sample the wheat foods. And they found these very delicious and so they would say ‘Oishii desu. Mō sukoshi’ [This is delicious. A little more, please].”[2]


[1] Quoted in Takashima Teruyuki, Amerika komugi senryaku: Nihon shinkō (Ie no Hikari Kyōkai, 1979), 106.

[2] Quoted in Takashima Teruyuki, Shokutaku no kage no seijōki: kome to mugi no sengoshi (NHK, 1978).


This post is part four in an ongoing series by Hopson on the history of nutrition in modern Japan. You can read his previous post here. This entry is based on his article “Ingrained Habits: The ‘Kitchen Cars’ and the Transformation of Postwar Japanese Diet and Identity.” Food, Culture & Society, November 2020.

Pulverized Food to Pulverize the Enemy!

By Nathan Hopson

This is the third in a planned series of posts on nutrition science and government-sanctioned recipes in imperial Japan.

Nukapan. Let me introduce our teatime specialty, rice bran fried in a pan. Mix wheat flour and rice bran, add a little water, and fry in a pan. Add no eggs or sugar. Fry for two minutes. It looks just like good custard. But it tastes bitter, smells like horse dung, and makes you cry when you eat it.[1]

Nukapan is an exemplary Japanese wartime culinary abomination, so much so that it features in Arthur Golden’s Memoirs of a Geisha, where the taste is upgraded from horse dung to “old, dried leather.”[2] However, it is not nukapan’s dubious gustatory merits that make it representative of the joys of cooking during the Pacific War. Instead, it is the use of flour and attention to waste reduction that make this a consummate early 1940s delight. Nukapan was both a direct response to food and nutrition shortages caused by catastrophic war planning failures and a manifestation of principles derived from a longer history of national nutritional activism in modern Japan.

Even before Japan plunged into the Pacific War, warning signs indicated the fragility of the Japanese food supply. True, despite constant Malthusian anxieties, Japan proper had achieved high levels of food self-sufficiency in the 1930s, but only by relying on its colonies, suzerains, and neighbors to make up the deficit. Japan’s wartime plan, such as it was, followed the Roman dictum, bellum se ipsum alet. Japan’s war planners believed they could fully integrate the resources―food, oil, etc.—of Southeast Asia into the metropole’s economy. “That strategy,” wrote Daniel Yergin, depended “on the integrity of Japan’s own shipping system.”[3] It failed. American forces decimated supply convoys, incapacitating Japanese shipping. Rice imports fell to ten-percent of prewar levels even before B-29 superfortresses destroyed over 130,000 tons of staples stored in Japan proper. No wonder, then, that the American Hunger Blockade was, according to postwar testimonies by Japanese leaders, “the Allies’ most effective tactic in ending the war.”[4]

Despite “adversity that stood a half-century of better living on its head,” the principles espoused for an ideal wartime diet remained relatively consistent.[5] By spring 1942, the daily menus that had been a fixture of Japan’s newspapers for two decades began the transformation from a combination of sensible middle-class fare with occasional aspirational “bougie foods” à la Japonaise to a grim set of “recipes for disaster” with dour headlines such as, “Meeting minimal nutrition needs with ingredients on hand.”[6] Though the punditocracy expressed confidence to the bitter end that “creative solutions for full use and consumption of foods to eliminate waste and maximize nutrition will appear,” they did not.[7] Instead, Japan doubled down on rationalization (viz., waste reduction and labor and resource optimization) and the substitution of nutritionally equivalent foods. The latter had been promoted by the Imperial Government Institute for Nutrition during the interwar years. Substitution’s primary wartime aim was to reduce rice consumption by supplementing or replacing it with other grains, potatoes, etc. Substitution was not limited to staples, however. No, substitution was comprehensive alchemy. Bread and noodles substituted for rice; beans, fish, insects, and wild birds for meat. Used tea leaves morphed into vegetables while potatoes evolved from vegetables to staples. Daikon and squash leaves―uneaten in better times―doubled as leafy vegetables and waste reduction. Porridges, soups, and other catch-alls dominated the menu, soaking up otherwise discarded ingredients and allowing creative caloric and nutritional supplementation. Potatoes were the most ubiquitous and despised of late wartime substitutes, but the keystone of substitution was “flour.”

Figure 1. Wartime postcard promoting rice conservation (setsumai). Author’s collection.

Perhaps the representative “flour-based food” (funshoku) was kōa pan (“Rising Asia Bread”). In fact, from acorns to kelp to rice hay, anything and everything that could be was powdered or pulverized and eaten, and animal feed and fertilizers such as soymeal and fishmeal found their way onto the menu, too. Comparatively, then, kōa pan might have been relatively harmless. A 1940 women’s magazine recipe called for flour, soymeal, baking powder, salt, powdered seaweed, fishmeal, substitute vegetables, and even sugar―which soon became unavailable. The accompanying illustration included butter; surely nobody was fooled.[8]

Figure 2. Kōa pan illustration (1940), reproduced in Saitō Minako’s Senka no reshipi (Iwanami Shoten, 2015:41).

These flour-based foods were controversial. Some praised their portability and long shelf life, others the ease of mass production and nutritional supplementation by eclectic mixing. Dissenters pointed out that many were, well, gross, and matched poorly with soy sauce, miso, and other traditional seasonings and condiments.[9] Digestive complaints abounded. Nevertheless, “flours” of all sorts gradually came to dominate wartime discourse―if not dinner―pushing out traditional “granular foods” (ryūshoku) such as rice.


In my next post, I will examine the surprising continuities of “flour-based food” in the early postwar years, and how American agricultural surplus helped complete a dietary transformation already underway during wartime.

This post is based on my “Women, Waste, and War: Food, Gender, and Rationalization in Wartime Japanese Discourse.” In Gender and Food in Contemporary East Asia, edited by Jooyeon Rhee, Chikako Nagayama, and Eric Li. Lexington Books, forthcoming.


References:

[1] Quoted in Thomas Havens, Valley of Darkness (Norton, 1978), 114.

[2] Arthur Golden, Memoirs of a Geisha (Vintage, 2011), 346.

[3] Daniel Yergin, The Prize (Free Press, 2014), 333.

[4] Sheldon Garon, “The Home Front and Food Insecurity in Wartime Japan: A Transnational Perspective,” in The Consumer on the Home Front: Second World War Civilian Consumption in Comparative Perspective, ed. Hartmut Berghoff, Jan Logemann, and Felix Romer (Oxford University Press, 2017), 51.

[5] Havens, Valley of Darkness, 123.

[6] “Asu no kondate,” Yomiuri Shimbun, March 3, 1942.

[7] Tsutsui Masayuki, “Kanso seikatsu no shihyō (12),” Yomiuri Shimbun, May 6, 1944.

[8] Saitō Minako, Senka no reshipi (Iwanami Shoten, 2015), 56.

[9] “Funshoku no senji futekikakusei,” Yomiuri Shimbun, September 4, 1944.

“Daily Recipes for Home Cooking” (1924)

By Nathan Hopson

This is the second in a planned series of posts on nutrition science and government-sanctioned recipes in imperial Japan.

Imagine a national cookbook. What would that look like? What would it say about the values and ideology of the society in which it was produced and the individuals and governmental organizations involved? Well, Japan gave us at least one answer to this almost a century ago, in 1924.

The first post in this series examined the “Nutrition Song,” a 1922 Japanese song with lyrics by the founding director of Japan’s Government Institution for Nutrition (IGIN). This song was part of an extensive and diverse media strategy that included early adoption of radio as a medium; IGIN-approved recipes were broadcast daily beginning in 1926 and printed the following day in the major newspapers. More remarkable as a manifesto than as a musical achievement, this song articulated a program for a rational, economical, modern diet. The lyrics encapsulate the IGIN’s advocacy of nutrition science as a win-win tool to improve individual quality of life and national strength.

In fact, the Institute began publishing daily “cheap, delicious recipes” on May 29, 1922 (figure 1), calling for a “kitchen revolution” to realize “an economical life and increased health for the Japanese.” Radio was a tantalizingly novel, fashionable, quintessentially modern medium rapidly adopted in urban Japan. Along with popular programs like radio calisthenics, the IGIN’s menus du jour, which carried the imprimatur of a premier government science laboratory and its celebrity chief, “modernized and ‘rationalized’ conceptions of the body, health, physical fitness, and exercise.” The appeal of both calisthenics and the Institute’s meal plans was both positive and negative, personal and patriotic. On the one hand, there was the possibility of personal betterment. On the other, many Japanese were plagued by “a nagging sense of physical inferiority vis-à-vis” the Western imperial powers.[1]

Figure 1 The IGIN’s first daily recipes published in a major newspaper. From Asahi Shinbun, May 29, 1922.

But even before its foray into radio, in 1924 the IGIN compiled a year’s worth of recipes originally published in newspapers into a cookbook called Daily Recipes for Home Cooking. A few columns explaining basic facts about nutrition, hygiene, etc., are sprinkled throughout, but otherwise Daily Recipes is a straightforward day-by-day guide to preparing “nutritious, delicious, and economical” breakfast, lunch, and dinner for a middle-class family of three.

When I picked up a copy of this book, I was delighted to find that the May 29 menu is in fact the same as that for the Institute’s memorable 1922 newspaper debut: shellfish simmered in soy sauce and mirin (tsukudani) and miso soup with cabbage for breakfast, fried bamboo shoots and salted salmon sashimi for lunch, and a pork and vegetable curry accompanied by spicy pickled bamboo shoots and wakame for dinner.

There are two marked differences between the 1922 Asahi article and the Daily Recipes version. First, the former explicitly lists rice as the main course, while the latter does not. (Conversely, the cookbook includes seasonings like soy sauce and sugar, not listed in the 1922 version.) The inclusion of rice is significant because, despite the IGIN’s open antagonism to white rice as wasteful and even a threat to national security (teaser!), the Institute expected a family of three to consume almost two liters of cooked rice daily. Second, the newspaper itemizes nutritional information, while the cookbook does not. This speaks to a difference in context. Cookbook buyers were likely to be converts to the IGIN’s ideology of “economical nutrition” and believers in the Institute’s bona fides and its scientized menu based on the principles of quantification and substitution. If the newspaper recipes were proselytization for the New Nutrition-style IGIN diet, the cookbook was more “preaching to the choir.”

Table 1 Nutrition information for IGIN’s May 29, 1922/1924 daily recipes (serves 3)

Ingredients Amount (g) Protein (g) Calories Price (sen)
Rice 1.9 (liters) 100.4 4814.4 54
Cabbage 75 2.2 35.2 2
Miso 112.5 13.8 177.9 3
Shellfish 75 13.6 57 10
Salted salmon 225 58.7 306 9
Daikon 150 1.1 27 2
Bamboo shoots 300 7.8 90 1
Sesame oil 56 0 506.3 4.5
Wheat flour 75 8.8 274.2 2
Beef 187.5 28.7 598.1 15
Carrot 56 0.7 21.9 2
Potato 112.5 1.7 96.8 2
Wakame 19 2.2 38.4 2
Suet 45 0.2 411.7 3.5
Total 240 7455 112
Total/person 80 2485 37.3

*Amounts approximate; calculated from Japanese Imperial units
**Sen = ¥1/100

To return to my original question, as exemplified by this daily menu plan from Daily Recipes, the IGIN relentlessly backed a national dietary reform program couched in the Fordist/Taylorist logic of quantification and substitution. In doing so, the Institute appealed to the self-interest of the new professionalizing housewife, who was increasingly expected to mobilize modern science to improve the efficiency and quality of life of her family—and by extension, the nation.


[1] Kerim Yasar, Electrified Voices: How the Telephone, Phonograph, and Radio Shaped Modern Japan, 1868-1945 (Columbia University Press, 2018), 120.

Nathan Hopson is an associate professor of Japanese and East Asian history at Nagoya University, Japan. His first book, Ennobling Japan’s Savage Northeast: Tōhoku as Postwar Thought, 1945-2011 (Harvard University Asia Center, 2017) treated the place of Tōhoku (northeast Honshu) in modern Japanese national history. He is currently researching the history of school lunches in Japan and their relationship to the development and application of nutrition science as a technology of national strengthening, focusing on the history of governmental “nutritional activism” and the school lunch program, 1920-present.