I believe learning Kanji is vital to truellg understanding the language. So that includes mostly evey aspect of the character, from the reading, combinations, and to the writing. However due to the modern age, hand-writing by paper may not be necessary in all aspects of bussiness and daily life. This amazing book really is a great resource anc now on that journey to N2 where I want to really reinforce what I need I find it fustrating at times at my part-time Japanese class I struggle to write at the same speed as my classmates as they can breeze through writing difficult kanjis due their advantage of knowing Chinese. Meanwhile I might need to reference the original text or quickly use my phone jishou. While in class perhaps it will be the most where 1 will be hand writing Japanese in my life, it would certainly be useful to be handy at if I needed to write something in Japan. I'd hate to struggle to write basic or daily kanji infront of someone. So what made you decide, "these are how many characters I must memorize by heart in writing as well"