Comment by Sardtok
I suppose you're counting the joyo kanji plus kana alphabets with diacritics. But the actual count of kanji is much higher, even if Japanese uses a relatively small number of characters for day-to-day writing.
Pretty much every native university student I met when I studied there, had passed the Kanji Kentei level 1 test. A certification of proficiency in around 6000 kanji.
2100 I took from Wikipedia:
> Japanese primary and secondary school students are required to learn 2,136 jōyō kanji as of 2010.[4] The total number of kanji is well over 50,000, though this includes tens of thousands of characters only present in historical writings and never used in modern Japanese.
https://en.wikipedia.org/wiki/Japanese_writing_system