iroha(sasaki) is a VOCALOID producer who debuted in September 2007 and is well known for the hit song "Roshin Yuukai", famous for appearing in the top 3 on the Weekly VOCALOID Rankings for six consecutive weeks. After Roshin Yuukai became a hit, he was given a producer name: Itsuu-P (胃痛P) (meaning "stomach ache"), because a large amount of remarks on the video said "My stomach hurts". He collaborates with many other producer for both his and other peoples' works. He works with the lyricist n under the name "シリカ" or "Silica".

His first song "moon" has also become a hit. iroha(sasaki) generally made trance and drum and bass music early in his music career but has expanded to other genres such as pop ("Shirley!!") and traditional ("Midori Youyou"). Though he generally uses VOCALOID, he has produced the song "Like⇒Love" using Haruka Nana. He is from Sendai, Miyagi. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.