Kana-to-kanji conversion method, apparatus and storage medium

A start-up processing unit of a server sends to a client a character inputting web-page and a program of applications that the server handles concurrently. After converting reading information of an input character string received from the client and for which an operating character code is designated, into kanji character strings of an intermediate code and an operating character code, a kana-to-kanji conversion unit creates a candidate list of a kanji character string consisting of character images of the operating character code and the intermediate code, sends the candidate list to the client together with a candidate selection program and causes the client to select a candidate character string of kanji. An editing/outputting unit receives the operating character code of a character string containing the selected kanji candidate from the client and transfers it to a corresponding operation system.