VOL.214 APRIL 2026
THE APPEAL OF YOSHOKU: JAPANESE-STYLE WESTERN CUISINE (PART 2) Sozai Pan: Japan’s Unique Food Culture

Kare pan (curry bread), a well-known variety of sozai pan

Along with the spread of yoshoku, or Japanese-style Western cuisine, Japan has developed a unique culinary tradition known as sozai¹ pan (lit. “side-dish bread”), a bread stuffed with a side dish more commonly served with rice. We interviewed an expert about its definition and background.

While food cultures that combine bread with side dishes exist all over the world, Japan has developed two distinctive varieties of its own, named for their shapes: chori pan (lit. “cooked bread”) and sozai pan. INOUE Yoshifumi, who has engaged in bread-making education at the Japan Institute of Baking for years, explains the difference in their definitions.

“Sandwiches and hamburgers, in which the filling is placed in between bread slices, are called chori pan and are eaten all around the world. However, in Japan, sozai pan generally refers to a type of prepared bread in which savory fillings are set into the dough before baking or frying. Sometimes, sozai pan also has a broader meaning that includes chori pan.”

According to INOUE, the technique of baking fillings together with the dough is not unique to Japan. What differs from country to country are the types of fillings commonly used in each region and the properties of the bread dough.

“While Western bread tends to emphasize a firm, chewy texture, Japanese sozai pan is defined by its soft dough. Sozai pan has evolved uniquely by combining this soft, moist dough with the many different side dishes enjoyed in Japan.”

This combination of soft bread dough and various fillings have evolved in Japan along with the spread of yoshoku. A look at the history of sozai pan reveals that anpan, a bread filled with sweet red bean paste² and first baked in 1874, was the origin of Japan’s unique concept of baking bread with fillings in the dough (see “Anpan: Born from the Fusion of Western and Japanese Culture,” HIGHLIGHTING Japan, August 2025 issue). Later, in 1927, kare pan (curry bread) was created in Tokyo. It became popular as a convenient way to enjoy curry — a yoshoku growing popular at the time — with bread (see “The Evolution of the Japanese Classic, Curry Rice,” HIGHLIGHTING Japan, August 2025 issue).

After World War II, the School Lunch Program Act was enacted in 1954. The adoption of koppe pan (an oblong type of bread roll) as a staple food in school lunch at elementary and junior high schools nationwide (see “The Significance and Evolution of Japan’s School Lunch Program,” HIGHLIGHTING Japan, December 2025 issue) provided major impetus for bread to become a regular item on family dining tables.

Amid this spread of bread consumption, various types of sozai pan that combine bread with a wide range of side dishes popular in homes and restaurants were created. Prominent examples blending Japanese and Western elements, are yakisoba pan (yakisoba³ sandwiched in koppe pan) and korokke pan (a croquette sandwich) (see “Korokke: A Beloved Dish in Japanese Households,” HIGHLIGHTING Japan, August 2025 issue).

INOUE adds, “Bakeries in Japan are coming up with new bread products every day based on their own sensibilities, resulting in an extremely rich variety of creations.”

In recent years, regionally distinctive sozai pan have emerged. These long-established distinctive regional specialties include Hokkaido’s chikuwa pan — chikuwa, or tube-shaped fish cake, filled with tuna salad baked in bread dough — and Shiga Prefecture's salada pan, which combines chopped takuan⁴ pickles and mayonnaise in a koppe pan.

INOUE remarks, “Sozai pan full of uniquely Japanese ingenuity is also attracting attention overseas, especially in Asia, and interest in baking techniques and product development is also on the rise.” While integrating imported bread cultures with Japanese taste sensibilities and baking techniques, Japan’s sozai pan has evolved independently alongside yoshoku and has become one of Japanese unique forms of food culture, now reexported overseas.

• 1. Side dishes usually prepared at home, but can also include commercially prepared side dishes.
• 2. A paste made by boiling beans down and mashing and kneading them with sugar, often used in Japanese sweets.
• 3. A noodle dish made by stir-frying steamed Chinese noodles with meat and vegetables, and adding sauce for flavor.
• 4. A type of pickle eaten all over Japan. Made by fermenting daikon, radish in salt or rice bran.

By TANAKA Nozomi
Photo: PIXTA