my tuition teacher says: after you drank yomeishu u will *ZzzzZZzzZz* and wakes up refreshed. i donno, didnt try before. gonna try after my exam =.= (haven't finish school yet)

and he also mention: if you are an adult, try guinness stout and you shall sleep straight after you drink... and have the same effect as above. O.O according to him la.