Search gender: all male female ニイハル Japanese Boy Names Variations. 1 names found. gender: all male female Name: niharu Katakana: ニイハル 1 Kanji: 新治 Meaning: 新New. New things. To make new. 治Govern. Manage. Quell. Judge. Correct. To adjust. To cure illness or injury. To treat. To compare. To help. To flourish. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > ニイハル Japanese Boy Names Variations.