About Japan, for beginners - Japanese name(2)

The first characters which the Japanese used were Chinese letters.
We call them kanji. Kanji means Han dynasty's letters.
Later two letters were formed on ground of kanji.
Hiragana and katakana. They are called kana.
Kana means false letters, or temporary letters. The Japanese thought that only Chinese letters were true letters.
Chinese letters are logograms. For example, 北 has meaning of north and pronounciation of bei.
It is Beijing's Bei.
We used kita as meaning of north in original Japanese. So when we write the letter of 北, we prounounce it kita. But 北 has other pronounciations in Japanese, like hô, hok, and hoku.
Hokkaidô's Hok is written by the letter.
Pronounciations of kanji, not in original Japanese, were from ancient China. They are different from modern Chinese.
We call the kanji's pronounciations from ancient China on-yomi.
We call the kanji's pronounciations based on original Japanese kun-yomi.
One kanji letter has more than two different pronounciations.
It makes impossible to know the correct pronouciations of person's names on history in written text.
For example, An Empress named Teishi was on the 10th century.
We know only her name written in kanji, 定子.
But we don't know the pronounciation of her name.
There are many possibilities. Maybe it would be Sadako. But it is not proved exactly. So we call her by on-yomi.
ITÔ Hirofumi was the first PM of Japan in late 19th century.
His name was written, 伊藤博文, in kanji.
He called often Itô Hakubun. Hakubun was pronounciation in on-yomi of his personal name Hirofumi.
Hirofumi was kun-yomi, and Hakubun was on-yomi.
The last shôgun's name was TOKUGAWA Yoshinobu, and he also often called in on-yomi Keiki, not Yoshinobu.
The pronounciations of Keiki and Yoshinobu are different, but have the same letter in kanji.
In one personal name, there are some cases mixed by on-yomi and kun-yomi.
For example, my personal name is Kazuma, written 和馬 in kanji.
和(kazu)+馬(ma), it means Japanese horse.
Kazu is kun-yomi of the letter.
Ma is on-yomi of the letter.