FYI I've been using ibus+anthy on sway for a while now, however recently switched to ibus+mozc because the prediction box in anthy started acting up/disappearing. Mozc seems to be working great so far (and actually what I wanted to use in the first place, but I believe I might have had the same issue you experienced)
はい、Swayでibus+anthyはできます。Mozcはできないと思いました、でも今から変わったが可能性です。Swayを楽しんで!
ありがとうございます!すぐに試してみたいですヽ(=´▽`=)ノ
How about fcitx?
That was the only gripe I had with sway. It solved all my tiny issues with i3 and made config much nicer too. Certainly making the switch if IME is better (or if I can easily help out).
Real big thanks to the wlroots/sway community.