Search gender: all male female Niharu Boy Name Meaning, Kanji 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 For Japanese Names > Niharu Boy Name Meaning, Kanji Variations.