kana arrangement is optimized for efficiency.That is, keys correspond to hiragana directly. TRON is a input system, a layout, and a special ergonomic keyboard. Even though JIS X6004 is no longer a JIS standard, it is actually still in use and its variations are also being developed by the enthusiasts. Today its superior technical design has been re-evaluated as it becomes easy to scan and analyze huge Japanese texts and n-grams using personal computers. We could see JIS X6004 as a Japanese Dvorak or Colemak layout, and the current JIS standard Kana layout as QWERTY. Since white space characters appear far less frequently in Japanese than in English, the same typing method can be used both in Japanese and English with this JIS X6004 configuration. JIS X6004 allows a shift key to be placed in the center of the keyboard where a space-bar is placed. While its technical design was superb for professional typists, JIS X6004 was abandoned as a JIS standard in 1999 due to its unpopularity in the market. JIS X6004 was a Japanese industrial standard Kana layout established in 1986 to amend various issues in the current, old JIS standard Kana layout. (Left Shift and right Shift are not differentiated.)Ī dedicated key is used for the Dakuten ゛. Shift key is prefixed, a different kana is typed. That is, press it, release it, then the next key press will be effected. The kana are arranged according to frequency and ease of the key-press position. M-System input system and keyboard was designed by Dr Masasuke Morita at NEC in 1983. Kana with dakuten are typed by pressing the thumb-shift of the other hand. Here is a summary of the different layouts: QWERTY JIS Romaji input. And there are many ways to arrange the kana on keyboard too. There are many ways to arrange the English letters on keyboard. Japanese Input Method Japanese Keyboard Layouts Intro to Japanese Writing System and Input Method
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