Kanji Puzzle

Are you interested in the Japanese language?
This puzzle features commonly-used "Niji-Jukugo" words in Japan. The Niji-Jukugo is a two-Kanji (Chinese)-character compound word.
If you are not a native Japanese speaker and can answer to this puzzle, you must be particularly interested in the Japanese language.

Rules of this game

One Kanji is hidden in the center of the matrix. Surrounding Kanjis using this central Kanji are also hidden. Each combination (central Kanji and one of surroundings) forms a Niji-Jukugo. Arrows from and to the center panel refer to the order of Kanji characters in each Niji-Jukugo.
Open the surrounding (hint) panels one by one to guess the central Kanji within a given time limit and as low number of opened hint panels as possible.
The time limit is 2 minutes (120 seconds) per challenge, and you can open up to 2 of the hint panels with no points deducted.
 
New question data are available for download on every Monday and Thursday (Japan Time).