Endoh often stars in songs that have very long notes or extremely high notes, and this ability was dubbed "Super Endoh Time" by fans. The most well-known example being containing a twenty-second note. Another example is "Seventh Explosion", where he would hold a note for twenty-five seconds, and five seconds in, Fukuyama would join him. The JAM Project songs with the highest note that Masaaki Endoh sings as of the release of their 15th anniversary album is a sustained E5 in "Rocks". He is also well known for yelling English words in JAM Project songs such as "MAXON".