姉し妹まい会がい社しゃしまいがいしゃMeanings1nounaffiliated company; sister companyRefers to a company that is affiliated with another, often under the same parent group. Compare 兄弟会社 (brother company), which is also used.See also: 兄弟会社当とう社しゃの姉し妹まい会社がいしゃが
