It almost looks like a smiley face without eyes
HOW TO WRITE IT (from top- left to right)
ROMAJI - hi SOUND - [as in HE] 23 k wav
MEMORY: It looks like HE has both hands raised
GO
1 a i u e o R 2 ka ki ku ke ko R 3 sa shi su se so R 4 ta chi tsu te to R 5 na ni nu ne no R 6 ha hi fu he ho R 7 ma mi mu me mo R 8 ya yu yo R 9 ra ri ru re ro R 10 wa n R 11 combo 12 last