Greetings Chuhou Joutai players.
You thought version 1.3.0 would be the last update, right? Wrong! Somebody apparently found a bug in the API which prevented achievements and/or high scores from being uploaded to the leaderboard. We have since fixed the issue. If you earned any previous achievements before this version, you will need to launch the game once to refresh and unlock any achievements on Steam.
Have a good day in Kozankyo!