Why is it more difficult to remember Japanese words if you avoid Kanji? When we learn new words at school, we memorize sound and Kanji together. And when we use words, Kanji is in mind even in oral communication. If you are foreigner and don't want to remember Kanji, it would make your Japanese study harder. There are two reasons. 1) Japanese phonetic sound is very limited and it is almost impossible to distinguish one from the other without Kanji e.g.) 冷める(sameru) 閉める(simeru) is totally different verb but sound very similar. 2) If you remember Kanji and it meaning, you can guess the meaning of new words in which the same Kanji is included. e.g.) If you remember the shape of Kanji 「冷」 and its meaning 「cold」you can guess the meaning of other words such as 「冷却水（れいきゃくすい）」「冷（さ）ます」「冷蔵庫（れいぞうこ）」「冷（つめ）たい水（みず）」「冷静（れいせい）」「冷（ひ）や酒（ざけ）」 but without Kanji, you have to memorize them separately, which sounds impossible to me. I recommend to memorize words with same Kanji together if you are intermediate or advance level.

What is the most complicated point to learn you language? For example, when I was using French, I had to always think the noun masculine-feminine/ single-plural. When I'm using Japanese, I have to always think what is the appropriate politeness level with this person I'm talking to. Please tell me what is the most complicated point in your language?