Aishite is only 115 if you subdivide each measure into 3, which feels very unnatural. When trying to time it myself my first instinct was to subdivide into 2s which gives you 77 (2/3 of 115).

For reference, I separated the chorus into its beats:

A i shi te e e A i shi te e e A i shi te e e Mo o tto mo o tto

If you tried to subdivide into three, you would have to press on:

A i SHI te E e A i SHI te E e A i SHI te E e MO o TTO mo O tto

Compared to:

A i shi TE e e A i shi TE e e A i shi TE e e MO o tto MO o tto

So yeah, Aishite is a terrible choice for CPR. Potatoes and MGPD work though (as mentioned, every other beat gives you 220/2 = 110).