building backlinks websites
 

So I am recently try to increase web traffic and rank for some keywords (Kanji symbols, Hiragana chart, Katakana,... things like those).
Apart from some websites in my niches ( our website is about How to learn Japanese online. So we write everything relates to Japanese language, and Japanese culture).
I wonder if there are websites that allow off-topic thread with easy rules for insert backlinks.
Really need some recommendation from SEO experts !!