I have seen chi and ti, both of which when qwerty typed on standard windows or mac produce ち. I have never seen it as tchi. つ is often seen as tu or tsu. I ha

I have seen chi and ti, both of which when qwerty typed on standard windows or mac produce ち. I have never seen it as tchi. つ is often seen as tu or tsu. I have been in Japan for over a decade.