List of kanji by school year
1st year (80 characters) / 第一学年(80字)
2nd year (160 characters) / 第二学年(160字)
3rd year (200 characters) / 第三学年(200字)
4th year (200 characters) / 第四学年(200字)
5th year (185 characters) / 第五学年(185字)
6th year (181 characters) / 第六学年(181字)
From Middle school (1130 characters) / 中学で習う漢字(1130字)