Japan Knowledge http://purl.lib.uiowa.edu/japanknowledge
This reference sources database includes 字通、日本国語大辞典、数え方の辞典、デジタル大辞泉、日本大百科全書(ニッポニカ)、Encyclopedia of Japan、Imidas、現代用語の基礎知識、日本人名大辞典 and many more ditcitionaries. Knowledge Searcher function could help you use Japanese reference sources.
Kotobank http://kotobank.jp
Includes 118 dictionaries, encyclopedias, and other reference books. List of dictionaries: http://kotobank.jp/guide/dictionary.html
Weblo 辞書 http://www.weblio.jp/
Collection of dictionaries including 類語 (thesaurus), 英和・和英(English-Japanese/Japanese-English), 手話 (sign language), and many more glossaries.
Goo 辞書 http://dictionary.goo.ne.jp/
Dictionaries available at Goo 辞書 Site: EXCEED 英和辞典, EXCEED 和英辞典, 大辞林 第2版 , デイリー 新語辞典+α, 新明解四字熟語辞, etc.
Yahoo 辞書 http://dic.yahoo.co.jp/
Dictionaries available at Yahoo 辞書 site: 大辞泉, 大辞林, 必携類語実用辞典, プログレッシブ英和中辞典, 新グローバル英和辞典, プログレッシブ和英中辞典, ニューセンチュリー和英辞典. You have two options for Japanese dictionaries, English-Japaense dictionaries, and Japanese-English dictionaries.
Eijiro on the web 英辞郎 http://www.alc.co.jp/
Complied by a group of interpreters and translators. Especially useful to look up colloquial expressions and new words.
RNN 時事英語辞典 http://www.rnnnews.jp/
Useful website for reading news and current affairs.
手書き漢字認識 http://kanji.sljfaq.org/drawj.html
Use your mouse like your pen and look up Chinese characters.
Japanese Learner's Dictionary http://dictionary.j-cat.org/
You can listen to pronounciation. You can search this dictionary site in Japanese, English, and Romaji.
Jim Breen's WWWJDIC Japanese-English Dictionary Server http://www.csse.monash.edu.au/~jwb/wwwjdic.html
English-Japanese, Japanese-English, Kanji dictionaries and more are available.
Rikai http://www.rikai.com/perl/Home.pl
Use your mouse to look up words when reading websites or electronic documents.
"Recent Dictionaries of Note: New Reference Volumes that Get to the Heart of teh Lanuage" by Emmanji Jiro appeared in the Japan Foundation's "Japanese Book News #74." The following dictionaries were introduced in the article.
Subject Headings:
Japanese language -- Dictionaries -- English.
English language -- Dictionaries -- Japanese.
Lists 2800 words with romaji readings, "rubi,"examples, and parallel entries in Japanese and English. Good for beginners.
Subject Heading: Japanese language -- Dictionaries.
JapanKnowledge includes 日本国語大辞典 and other dictionaries.
Accompanied by users guide (国語辞典の使い方).
Subject Heading: Japanese language -- Synonyms and antonyms -- Dictionaries.
With Romaji and "rubi."Explanations and examples are provided in English.
Subject Headings: Japanese language -- Etymology -- Dictionaries -- Japanese
Subject Heading: Japanese language -- Grammar -- Dictionaries.
Subject Heading: Chinese language -- Dictionaries -- Japanese.
“現代の日本人が使うための、漢字の辞典。
漢和辞典と国語辞典のいいところをあわせ持った辞典。”
『漢字は日本語である』小駒勝美
This Kanji dictionary cites examples from modern literature after the Meiji era.
Includes Japanese phrases and loan words in Kanji.
Accompanied by users guide (漢字辞典の使い方). Rubi readings are provided.
Subject Headings:
Japanese language -- Onomatopoeic words -- Dictionaries.
Japanese language -- Mimetic words -- Dictionaries.
Manga is used to illustrate the use of onomatopoeic and mimetic words.
Subject Heading: Japanese language -- Numerals -- Dictionaries.