I'm a huge nerd, so of course I had the need to see japanese song titles on my phone, and also write SMS messages in japanese. I also have an imported japanese phone, but it's shit (Toshiba 911T). People keep asking me how it works and how to do it on my flickr comments, so I decided to write a summary page. This is the only guide to using Japanese on a european/western Sony Ericsson phone that I know of.
Japanese text input
Here's a japanese text input Java (J2ME) midlet I wrote, which is kind of a tiny japanese IME. It's only tested on Sony Ericsson phones, but I don't see any reason it wouldn't work on other phones (provided you have the fonts and free memory).
Download:
BeeperInput.jarInstall: Send it to your phone using Bluetooth, or enter the link above into the web browser, or put the jar file in the "other" folder on the internal memory/memory card using the USB cable/a card reader and launch it.
How to use it:The input method is based on the "Beeper" (aka ポケベル入力) input mode on my Softbank phone. I'd love to implement a proper ka-ki-ku-ke-ko-type predictive text input but getting a frequency database etc is beyond the effort I'm willing to expend.
Input modes: Hit * to switch between hiragana, katakana and symbol input
Kana: You enter kana by first pressing the button corresponding to the consonant. 1 is for vowels, 2 is for K_, 3 is for S_, etc. Then you enter the vowel, 1 for A, 2 for I etc. Then the kana you entered shows up on screen. For N, hit zero two times in a row. To add dakuon/handakuon/youon, hit * multiple times after you entered a kana.
Kanji: Once you've entered the kana for a kanji, press the down arrow. Press it multiple times for different kanji. When you've selected a kanji, hit the right arrow, and you can write the next kanji. The database is based on edict, but also contains some basic symbols such as はーと and ほし
Emoji: From the menu you can switch databases to the Kaomoji database. Input for this works the same as for Kanji. The dictionary included is the orange31-kh dictionary.
Output: Select "Copy" to bring up your input in a standard sony ericsson dialog. From here you can use the sony ericsson copy/paste feature to put the text into an SMS, email, a web page form, or whatever you wish. Note that the recipient also needs a japanese font to view it.
Cheat sheet: On phones with 320x240 or larger screens, a cheat sheet for the keypad is shown on screen. For phones with smaller screens, refer to this diagram out of the Softbank manual


