MainIchi

MainIchi, Ltd. (株式会社マイン市) is a Yamataian multinational company founded in 1995, facilitating consumer-to-consumer and business-to-consumer sales through its website and mobile apps. MainIchi is the largest community-powered marketplace in Yamatai and Hinomoto, with over 10 billion En worth of transactions occurring on the platform each month.

The company manages the MainIchi website, an online auction and shopping website in which people and businesses buy and sell a wide variety of goods and services worldwide. The website is free to use for buyers, but sellers are charged fees for listing items after a limited number of free listings, and an additional or separate fee when those items are sold. Within Yamatai, MainIchi allows users to ship items anonymously from local convenience stores through agreements with Kangaroo Transport and Yamatai Imperial Post. In addition, MainIchi Ltd. also operates the KessaIchi international electronic payment and money transfer system.

MainIchi's name is a wordplay combining the word for "everyday" (毎日; mainichi) with the word for "market" (市; ichi). Similarly, KessaIchi combines the word for payment (決済; kessai) with ichi, though in this case the wordplay is mainly for branding purposes.