There are many social software that Japanese people like to use, such as Line, Facebook and Twitter. However, if it is only to develop some business of the company, I recommend downloading Line directly, because Facebook and Twitter are mostly used to share life and express opinions on a certain issue, like Weibo in China, while Line is used for chatting, with a large number of users, high frequency and wide range, like WeChat in China, which can be well used for business communication and negotiation.

Finally, I sincerely advise the subject that it is ok to engage in a career, but don't miss the event of a lifetime because of the career. If you have time, look for it on domestic social software. Being a partner in marriage is very good. Super strict audit mechanism, filtering a large number of users with low quality. Everyone is honest in finding friends, and the ink is not fake. It is a healthy, efficient and serious platform for making friends, which is well worth a try.