3 Laddered keyboard layout suits for alphabetical languages without conversion

Do you know "conversion"? Of course there's nothing specitial even if you have never heard it. We envy you because you only have to learn the 26 alphabetical letters to describe everything in your language. On the other hand, we should remember nearly ten thousands "KANJI" in addition to the basic 46 "HIRAGANA" characters. Japanese is one of the most difficult languages to learn for a human brain.

"Conversion" means, in our context, the correspondence between HIRAGANA and KANJI.  We type HIRAGANA letters, and execute the conversion to KANJI by pressing the space key. In many cases one HIRAGANA section corresponds several KANJI words, so we should select the correct one by typing the space key by multiple times. After the seeking the KANJI, we press enter to fix the selected KANJI. Pressing spece key is similar to English sentences, however, we also press Enter frequently. In contrast, you probably press enter only when you need to move to a new line.

In summery, Japanese texts are more difficult for typing than English ones because of the following additional factors or procedures.

・More basic character (46 HIRAGANA vs 26 alphabets)

・Conversion HIRAGANA to KANJI by pressing Space several times.

・Decision of appropriate KANJI by pressing Enter.

The keyboard layout, developed by English-speaking people, is not suitable for Japanese. To our regret, the layout of JIS keyboard is almost the same as that of US keyboard although slight differences such as the size of functioning keys (Enter, Backspace, Space, Right shift) , the additional key "ろ" and the layout of symbols. Japanese HIRAGAKA layout (so called "JIS KANA") requires our right little finger to press 12 keys. Can't you imagine to press 12 letters by the right little finger?

Essentially 46 HIRAGANA is too many for humans because we have only 10 fingers. That is why most Japanese people learn "Romaji" to type words. Direct typing HIRAGANA words should have been an efficient way, but the lack of abilities for developing the novel keyboard layout keeps Japanese people from typing, writing, thinking, working and creating new things efficiently.