一脈 いちみゃく相通 そうつうしちゃう
ichimyaku sō tsūshi chau

Ichidan Verb
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 一脈相通ずる

1. Connected; Linked; Share a common thread; (Regretfully) Became connected

Completed Action
Colloquial