Resources

Highly recommended

Textbooks

• Minna no nihongo
• Big package #1
• Big package #2
• Shin Kanzen Master
• N3
• Grammar
• Reading
• Kanji
• Listening
• Vocabulary
• N2
• Grammar
• Reading
• Kanji
• Listening
• Vocabulary
• New Approach
• 500 (中上級)
• Chuukyuu kara manabu nihongo PDF + CDs
• Jōkyū DeManabu Nihongo
• Rapid Reading Japanese (DjVU)
• Donna toki dou tsukau
• 200 Essential Japanese Expressions
• 500 Essential Japanese Expressions
• Nihongo sou matome
• N3
• Grammar
• Vocabulary
• Listening comprehension
• Kanji
• Reading
• Tanoshiku Yomou
• A Practical Guide to Mimetic Expressions through Pictures
• A Dictionary of Basic Japanese Grammar
• A Dictionary of Intermediate Japanese Grammar
• A Dictionary of Advanced Japanese Grammar
• 501 Japanese Verbs
• 70 Japanese Gestures
• Essential Japanese Grammar
• Handbook of Japanese Grammar
• Let's learn Japanese. Basic I - Volume 1
• Let's learn Japanese. Basic I - Volume 2
• Let's learn Japanese. Basic I - Volume 3
• Japanese for dummies
• Japanese Grammar
• Basic Japanese: A Grammar and Workbook
• Complete idiot's Guide to Conversational Japanese
• A Guide to Reading and Writing Japanese: 4th ed.
• Japanese: A Comprehensive Grammar
• Japanese: Descriptive Grammar
• JLPT: Grammar Exercises Level 3 (Kanzen Masutaa)
• JLPT Grammar Exercises Level 2 (Kanzen Masutaa)
• JLPT Grammar Exercises Level 1 (Kanzen Masutaa)
• Tadashii Nihongo no Tsukaikata
• JLPT Moshi to Taisaku
• N3
• N2
• N1
• Gogaku dekiru
• Book
• CD
• Mainichi to kikitori
• vol.1 
• vol.2
• Shin Nihongo no Kiso
• Mainbook 1
• Mainbook 2
• Audio 1&2

Grammar

• Tae Kim’s Guide to Learning Japanese – Perfect for beginners. Tremendous source of different grammar constructions

• Jgram – An online grammar dictionary.

Kanji

• Basic Kanji Book 1
• Basic Kanji Book 2
• Intermediate Kanji Book 1
• Intermediate Kanji Book 2
• Remembering the Kanji 1
• Remembering the Kanji 2
• Remembering the Kanji 3

Readings 

• NHK Easy News - a great source of short news. 
• Read Real Japanese fiction: short stories by contemporary writers
• Reading Japanese with a smile: nine stories from a Japanese weekly magazine for intermediate learners

• Japanese Graded Readers level 1

• vol 1

• Onna no ko
• Hachi no hanashi
• Jonsan Nihon e
• Urashima Tarou
• Warai hanashi

• vol 2
• Takushii
• Sushi
• Kasajisou
• Jonsan basu no naka de
• Doushite saru no o wa mijikai
• vol 3
• Basu
• Kimono
• Doushite ebi ga
• Shitakiri Suzume
• Jonsan no natsuyasumi
• Japanese Graded Readers level 2
• vol 3
• Nihon no ofuro
• Houi to Chan'a
• Gonkitsune
• Sopi no fuyu no ie
• Ikkyuusan Sononi

• Japanese Graded Readers level 4

• vol 1
• Yuki Onna
• Nagai Takashi Genbaku No Chi Nagasaki Ni Ikite
• Toshishun
• Hashire Merosu
• Nogiku no haka

Listenings

• Let's learn Japanese Basic 1&2 (avi + pdf)

Apps & Tools

• Rikaikun/Rikaichan - a popup dictionary tool for Firefox, Thunderbird, Opera, Google Chrome etc. (the name varies) - it's an addon, so you have to search your brower in order to add it.

• Anki - flash cards. Tons of prepared decks that consist of materials from different textbooks (Genki, Minna no nihongo, New Approach etc.)

• zKanji  - a free study tool. Dictionary, example sentences, kanji search and information with animated stroke order diagrams, vocabulary list printing, study functions and much more.

• Tatoeba – Search for sentence examples from the Tanaka Corpus.

Books

• Harry Potter
• The Philosopher's Stone
• a sentence-by-sentence translations can be found here
• The Chamber of Secrets
• The Prisoner of Azkaban
• The Goblet of Fire - Part 1 & Part 2
• The Order of the Phoenix - Part 1 & Part 2
• The Half-Blood Prince - Part 1 & Part 2
• The Deathly Hallows