Japanese Rayu Chili Oil and Taberu Rayu Eating Oil Culture

Japan — rayu introduced from Chinese culture; domesticated as gyoza condiment from 1950s; taberu rayu trend launched by S&B Foods 2009; artisan eating oil market expansion from 2010–present

Rayu (辣油, literally 'spicy oil') is Japan's primary chili oil condiment — a sesame oil base infused with dried togarashi peppers, aromatics, and in its most refined forms, dried seafood and vegetables. The category divides into two distinct products: traditional thin rayu (for gyoza dipping, ramen finishing, cold tofu) and the post-2009 revolution of taberu rayu ('eating oil' or 'eating chili oil'), a semi-solid textured condiment popularised by S&B Foods' La-Yu with Crunchy Fried Garlic and Onion product that sparked a national trend. Taberu rayu contains fried garlic, onion, sesame seeds, and occasionally dried seafood in a dense paste that provides both heat and substantial texture — it is eaten directly by the spoonful on white rice, creating a complete quick meal. The artisan rayu market has exploded since 2009: roasted black bean rayu; dried scallop and chili; spicy miso-based versions; dried sakura shrimp versions; various degrees of heat from mild Shishito togarashi to intense Korean gochugaru base. Professional rayu production: infuse sesame oil and neutral oil blend with whole dried togarashi at 180°C for 3–5 minutes (the oil should sizzle vigorously around the peppers), strain, then re-infuse with aromatic additions at 130°C. The temperature management is critical: too hot destroys the sesame oil's aroma; too cool fails to extract capsaicin efficiently. Mayu (black garlic oil) — a related product where garlic is charred to near-black and infused into oil — is the Kumamoto ramen (Kogashi mayu) signature.

• Both Japanese taberu rayu and Chinese Lao Gan Ma are textured eating chili oils with fried ingredients — the Japanese product emerged independently but occupies an identical market position → Lao gan ma chili oil with crispy soybeans Chinese
• Both Japanese thin rayu and Sichuan hong you are finishing chili oils for dumplings and noodles — the sesame oil base is shared; the aromatic additions differ → Hong you chili oil for dan dan noodles and dumplings Sichuan
• Both Japanese taberu rayu and Korean gochujang serve as intensely flavoured tabletop condiments added directly to rice — different heat profiles and textures, identical eating function → Gochujang chili paste for tabletop seasoning Korean

Traditional thin rayu delivers a clean, sesame-aromatic heat; taberu rayu adds textural dimension through fried garlic and onion crisp — the combination of chili heat, sesame depth, and fried aromatic crunch creates a complete flavour experience suitable for direct rice service