| 摘要 |
A portable mobile unit, comprising: an input portion for inputting a letter or a numeral therethrough, wherein the input portion has at least fourteen (14) pieces of input keys; five (5) alphabetic letters of indicative vowels of Japanese language are assigned to five (5) input keys of said fourteen (14) pieces of input keys; and nine (9) alphabetic letters indicative of un-voiced consonants in consonants of Japanese language are assigned to nine (9) input keys, whereby an input of a voiced consonant or a half-voiced consonant is conducted by using an input key for use in inputting other consonant. With this, there is provided the portable mobile unit, which enables the input of Japanese language is possible even with a small number of key operations, in the manner similar to that of the Roman letter input method of Japanese language, with ease.
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