1. key
この曲は途中で調が変わる。This song changes key partway through.
2. mode (in gagaku)
3. time; tempo; rhythm
4. meter (of a poem); metre
5. style; form; mood; pattern
簡単にイラスト調に変換できた。It was easily converted into an illustration style.
6. tax in kind (paid with locally produced goods; under the ritsuryō system)