https://en-m.jinzhao.wiki/wiki/Keiretsu
2022年11月30日 · A keiretsu (Japanese: 系列, literally system, series, grouping of enterprises, order of succession) is a set of companies with interlocking business relationships and shareholdings.In the legal sense, it is a type of informal business group that are loosely organized alliances within the social world of Japan's business community.