[RadioKid]

Chinese people use over 50,000 of chinese characters (or Kanji/Hanji).
Recently, They use simplified Kanji in Main-land China while Original Kanji are used in Taiwan.

Korean people use Hangle Characters which they created. Total combination of Hangle could be over 10,000. And Original Kanji characters are still used in Korea.

Japanese people use around 50 of Hirakana, almost same number of Katakana and around 5,000 of Kanji which are not simplified.

Hirakara/Katanaka are actually simplefied Kanji to express Japanese sound in written form. There should have been many assignment set of Kanji to sound and only two sets servived.

Note that Chinese people have no sound oriented characters like as Hangle in Korea or Hirakana/katakana in Japan. Instead, they use alphabetical expression "Pinyin" to express sound.