While the exterior retains the charm of an old-fashioned building, the interior has been given a modern touch, creating a unique atmosphere. The high ceilings with a sense of openness, well-used wooden tables, and antique-style furniture placed here and there create a comfortable space, making it known as a "popular cafe in Okayama" where you can relax and enjoy your coffee.

ONSAYA's greatest attraction is its specialty coffee. They roast high-quality beans carefully selected from all over the world and carefully hand-brew each cup. The rich aroma and deep flavor will be appreciated not only by coffee lovers, but also by those who don't usually drink much coffee. Currently, they only serve waffles, sweets, and drinks, and do not serve Neapolitan pasta.

Music events are sometimes held on weekends.

In addition to the Hokancho store, there are also stores in Omotemachi Shopping Street, Okayama University Shikata Campus, and Toiyacho.