Tae Kim's Guide to Japanese Grammar
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Link)
A free and thorough online grammar guide, from the basics to advanced formal and literary forms. Instead of trying to structure a course around the logic of English grammar, this guide aims to explain the Japanese language from a Japanese point of view. It is also available as a
book.
Genki
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Link)
One of the most popular Japanese textbooks. It covers reading, listening, writing and speaking to build up to a solid and well-rounded understanding of the language. Every lesson also contains culture notes. The textbook is accompanied by a workbook and an audio CD, making it suitable for serious self-students.
Pimsleur
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Link)
Starting from a beginner level, this audio course provides great listening and speaking practice. A good choice for people who want to build confidence in their speaking skills before moving on to live conversation!
Japanese from Zero!
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Link)
More slow-paced than typical texbooks, this resource is ideal for people learning on their own who might like a more "hand-holding" approach. The author's
Youtube channel features lessons that can be watched as a complement to the books' chapters, but are also enjoyable on their own.
NHK Easy Japanese
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Link)
Short (~10 minutes each) audio lessons. Every lesson covers a basic grammar point or expression through an example conversation. Free.
Remembering The Kanji
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Link)
This method will teach you how to use mnemonics in order to memorize the meaning of all the basic kanji. Probably the easiest and fastest way to build a foundation for using kanji, especially if you combine it with a spaced repetition program such as
Anki.