Menma (メンマ, 麺麻, 麺碼) is a Japanese condiment made from lacto-fermented bamboo shoots.
[1][2] The trading company that would later become Marumatsu Bussan had been exporting dried bamboo shoots produced in Taiwan as shinachiku.
[3] Marumatsu Bussan founder Shūsui Matsumura claims that he came up with the new product name menma, a portmanteau of ramen (拉麺) and machiku (麻竹), the type of bamboo from which it is made, after seeing it served atop ramen in Yokohama Chinatown.
This name could not be trademarked but gradually became accepted as the common name for the condiment as its popularity grew in Japan.
Menma is not, however, customarily eaten atop noodles in Taiwan; the vegetable toppings on the popular noodle dish Zhajiangmian, 菜碼 (Pinyin: càimǎ) were once called 麵碼 (miànmǎ).