This is the 7837th most frequent Japanese word.
哲一
"哲一" is a Japanese male given name, typically meaning "wise" (哲) and "one" (一).
哲一 is used as a proper noun referring to an individual's name.
哲一は毎朝6時に起きます。
Tetsuichi wakes up every morning at 6 o'clock.
哲一 is used to show possession, indicating that the mentioned hobby belongs to Tetsuichi.
哲一の趣味は読書です。
Tetsuichi's hobby is reading books.
哲一 is used as the object of the action, specified as the companion of the subject.