This song seems to be a love song from Momus to a Japanese girl, describing the physiological reactions of being in love in a blend of shards of English and Japanese with a nice Auto-Tune touch.
Crying, shiku shiku
Reluctantly, shibu shibu
Repeatedly, tabi tabi
Just in time, giri giri
Hara hara, nervous heartbeat
Kira kira, glittering sparkle
Chika chika, the flickering light of the stars
Doki doki, the hammering beat of my heart
I'm messed up, mecha mecha
But you laugh, gera gera
In the lightning, goro goro
And your eyes, pika pika
Kisu kisu by the river
Gusha gusha, that flows so slow
Zaa zaa, in the sound of the pouring rain
Chiku chiku, when will I see you again?