[2][3][4] Aisumasen is a slightly corrupted version of the formal term sumimasen (すみません) which means "I'm sorry" in Japanese.
[4] Bielen and Urish claim that "Aisumasen (I'm Sorry)" has a similar rhythm to "a slowed down, semi-acoustic version" of "I Want You (She's So Heavy).
"[4] Music critic Johnny Rogan finds the song to be "occasionally powerful" and feels it "brings some depth" to the Mind Games album.
[2] Keith Spore of The Milwaukee Sentinel called the song "a lovely ballad" which serves as a reminder of Lennon's past brilliance.
[8] Bielen and Urish consider it to be one of Mind Games' strongest songs, although they think it may have been even stronger had Lennon stuck to his original lyrical impulses of "Call My Name.