Japan and Switzerland - Yo-ho-ho,tra-la-la
Switzerland and Japan - I-Ho-Ho Tra-La-La
Romi Paku (Switzerland) and Hiroki Takahashi (Japan) - O Vreneli (Hetalia World Series OST)
Hiroki Takahashi (as Japan) and Romi Paku (as Switzerland) - Yo-ho-ho, tra-la-la