一十三十一（Hitomitoi, born 天野一十三 (Amano Hitomi) on December 1, 1978）is a Japanese singer from Hokkaido, Japan. She is currently signed to Japanese record label Billboard Records. She's also part of the band Jintana & Emeralds. She lived in many countries before she graduated junior college and started her music career in New York. Read more on Last.fm