Search gender: all male female Nijiaki Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: nijiaki Katakana: ニジアキ 0 Kanji: 虹秋 Meaning: 虹Rainbow. 秋Autumn. One of the four seasons. An important time. Fruitfulness of crops. The time that passes. Years and months. Being past the prime of life. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Nijiaki Name Meaning, Kanji Variations.