ka ki ku ke ko (かきくけこ)
This looks like someone doing a karate kick. It sounds like “ka”, the beginning of “karate”.
This character looks like a key and sounds like “key”.
Imagine that this character is the open beak of a bird saying “koo”. It makes the same sound.
This character looks like a barrel, or keg. It’s spelled “ke” like the first two letters in “keg”.
This character looks like the outsides of a round coin. It’s spelled “ko” and sounds like the first two letters in “coin”.
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