Japanese prefectue

Do you know Japanese prefecture?
We have 47 prefectures.
「県」 This KANJI call [KEN]. It means a prefecture.
For example,my prefecture Kagasa. So,we call Kagawa KEN.
It use for 43 prefecturs.

「府」 This KANJI call [HU].
It use for only Osaka and Kyoto. Osaka HU. Kyoto HU.
HU is important place for old Japanese government.
There were 9 HUs in the old days.
And,since the MEIJI era government decided to call [HU] for Osaka and Kyoto.

「都」 This KANJI call [TO].
It use for only Tokyo.
Tokyo was also Tokyo HU.
But,since 1943 changed Tokyo TO.
Tokyo is the capital of Japan. So,Tokyo is only [TO].

「北海道」 This KANJI is HOKKAIDO.
It's a special!!!!! It's no KEN no HU no TO. only HOKKAIDO.
There were 3 KEN in HOKKAIDO in the old days.
But,now it was unified,HOKKAIDO.

What do you think about it?
Do you feel a bit of confusion about it? haha.
But,it's a just information!!

I hope all of you are having nice day!!
See Ya!!