Chinese character in common useとは 意味・読み方・使い方

As with Irinaka Station, a Nagoya City Subway Tsurumai Line facility whose name contains a Chinese character not included among the characters designated for common use in Japan, the name of Nagitsuji Station is difficult to read for many people if written in Chinese characters, and for this reason it had been proposed to write the station name in hiragana; ultimately, however, it was decided to use Chinese characters for the station name.発音を聞く 例文帳に追加

名古屋市営地下鉄鶴舞線いりなか駅（地名は杁中）と同様に「椥」の字が常用漢字表にないことや読めない人が多いことから平仮名駅名も候補にあったようだが、漢字表記になった。 - Wikipedia日英京都関連文書対訳コーパス