ー日本語学習のためのアプリ・サイト・本などの資料ー （Resources for those studying Japanese)
The first thing you should do when learning Japanese is to install this to your browser (rikaikun is for Chrome, google rikaichan for the firefox version.) when installed, just hovering your cursor over any Japanese text will cause a box to come up next to your cursor with the full list of meanings of that word, how to write the Kanji, etc. it is absolutely indispensible.
The most popular flashcard program. It features intuitive spaced repetition to assist with memorisation. Sounds can be attached to cards as well, to assist with the memorisation of pronunciation. Download the program at the above link and Japanese decks here.
Tip: Have a pen and paper with you whilst doing these, write down every one you don't instantly recognise three-four times. I went from 0 Japanese knowledge to knowing ~3000 kanji in around 8 months, a large part of which I credit Anki with. The rest I credit KanjiDamage, below, with.
Explains the methodology behind Kanji very well, imo. This site breaks down the Kanji into their radicals, making memorising new Kanji as easy as memorising a letter of the alphabet. It's all done very humorously too, which helped me immensely. Combine with Anki for the best results.
A well-structured online course that takes you through the very basics of Japanese, from very basic grammar to kana.
An app, very similar to Anki for Android and iPhone. You are urged to select a deck when you first select which language you would like to learn and then can choose from anything from the basic kana to vocabulary you'll need for the highest level of the JLPT. Very useful for studying.
Tae Kim's Japanese Grammar Guide:
A fantastic resource for learning grammar. It isn't 100% comprehensive, but it is the best on the internet for what it is. Comprises 90% of points that you'll need to understand the majority of speech and writing.
For obvious reasons I'm not going to link to roms, but we are a gaming site aren't we? Games are possibly the greatest resource you can use to pick up new vocabulary, kanji and grammar points. Back when I started really focussing my energy on getting good at Japanese, I ordered the Japanese version of Pokemon White 2, turned the Kanji on and wrote down every single word from the game I didn't recognise. Result? I learned more than 1500 new words; from a POKEMON GAME! That's just the start, various games have varying settings and so can teach you different things. Try your favourite games (best if they're more text heavy than say Mario) in Japanese and be surprised at the progress you'll make.
Songs, Movies, TV Shows:
On the web, look mainly on DailyMotion, NicoNico and Youku for streaming shows, other places exist too, but they've had the most content in my experience. Youtube also has a lot of music videos and such, but TV shows and movies are very rare finds. Download them using any of the stream grabber tools online and subtitle files usually aren't difficult to find. This is really a matter of personal preference as to what you like, but for speaking and listening practice there is no textbook that can compare to listening to and copying native resources. Personally I prefer comedies so AKBINGO! (A weekly variety show starring the idol group AKB48 and hosted by the Bad Boys; if you've seen that video of two girls blowing a cockroach at each other, this is the show that was taken from. I've linked one of my favourite eps. here, there are more than 250 in total to watch) and Vampire Girl vs. Frankenstein Girl (A "horror" film that is so overexaggerated that it's more a comedy), among others were of great help to me. Music is likewise a personal preference, but I found that big J-Pop groups (like AKB48 from the show above) songs' are rather grammatically simple, so they were very useful for remembering phrases, vocabulary and even some grammar points, no matter if it's your kind of music or not. Kyary Pamyu Pamyu deserves a shoutout too, her songs are incredibly strange, but for that reason they, and the new vocab you can pick up from them, will stick in your head and. never. ever. leave.
All of these are widely available on amazon.co.jp, eBay and other such sites, as well as in large bookstores. Even though we're moving towards a book-less world, these are still some of the best resources to use for language learning.
The Dictionaries of Japanese Grammar (Basic, Intermediate, Advanced)
The absolute best grammatical resources for Japanese. Every imaginable grammar point is explained in great detail and subtle nuance differences between some grammar points are explained very well. At around ~650 pages each, they are bulky which can intimidate some people, but if you give them a try you will learn a lot.
The Genki Series of textbooks
These have glowing reviews everywhere I have seen them online and are widely used in schools and universities. They are very useful for gaining comprehensive knowledge of the basics of Japanese up until an intermediate level.
The Shin-Kanzen Master series of books
These would be a great follow up to the genki books, offered in 3 JLPT levels, N3, N2 and N1, they are extremely thorough and with each level being split into four categories (reading comprehension, listening comprehension, kanji and vocabulary) these will be your best friend when you get serious about taking the JLPT 3 and above. If you can't afford all four books, I would push the grammar and reading comprehension ones most heavily. The books use NO ENGLISH and so you are learning Japanese, using Japanese; which makes the whole process a lot more involved.