If you're just going for achievements... Eh, save your time. I myself can read some Japanese, but the way the menu has it laid out during the Guessing the Tsukumogami's name part is just... Horrendous. Stick to the English version until you're fluent in Japanese. Yes, the option in Steam is English, but this isn't English, it's the Raw version.
I like the game, but I just don't like how small the Hiragana is on my screen (I have to squint and that hurts my head). I'm not too familiar (I can manage) on how to type it/write it and I can read it, but I can't seem to figure out how to write/type in 上着 (for the Jacket Tsukumogami / just randomly guessing for that achievement), but I can easily write/type in かかし. Also, the hints show up as random ä's or Á's and I can't exactly figure out the clue if it's not even Japanese.
All in all, what I'm trying to say is stick to the English version if you're going for achievements, otherwise you'll be stuck at guessing the first Tsukumogami's name for hours.