Single O Japan

Maruyama Coffee

長野・東京・神奈川

Founded in 1991. A pioneer of Japanese specialty coffee whose founder has served as a Cup of Excellence international judge. An active direct-trade buyer handling top-quality lots from Ethiopia, Colombia, Guatemala and beyond.

Horiguchi Coffee

東京（世田谷・新宿ほか）

Founded in 1990, a pioneer who laid the groundwork of Japanese specialty coffee. Known for direct origin visits, long-term farmer relationships, and books that systematized brewing and roasting theory. Excels at balanced medium to medium-dark roasts.

Light Up Coffee

東京（吉祥寺・新宿）

A popular Tokyo roaster specializing in light-roast single origins, showcasing the fruity, bright acidity of Ethiopia and Kenya. Devoted to making bean buying simple and fun, with carefully written tasting notes.

Glitch Coffee & Roasters

東京（神保町・赤坂）

A Tokyo roaster known for ultra-light specialty roasts, actively selecting strongly characterful lots — Ethiopian Gesha, natural process and more — and proposing a culture of enjoying coffee like wine.