Maruchiyo Yamaokaya Corp. engages in the operation of ramen (Chinese-style noodles) restaurants under the name Ramen Yamaokaya. Its products include shoyu (soy sauce) ramen, miso (bean paste) ramen, shio (salt) ramen, special miso ramen, and spicy miso ramen. The company was founded by Tadashi Yamaoka in February 1980 and is headquartered in Tsukuba, Japan.