The restaurant is known for its buckwheat noodles, which are stone-ground fresh every morning.

Lunch at Gonpachi is generally more affordable than dinner, with set menus often including a main dish, miso soup, and sometimes soba or salad.

Popular options include the Gonpachi Ten-don (shrimp and vegetable tempura bowl) for around ¥1,200 and the Oyako Don (chicken and egg rice bowl) for ¥1,100.

For a more refined meal, Sushi Gonpachi (located in a smaller, intimate space within the same venue) offers lunch courses like the "Iki" set for ¥3,000, featuring appetizers and ten pieces of nigiri.