In the field of mobile information devices for personal use, JavaTM has been a focus of attention. It provides easy development of network-oriented applications and is equipped with a mechanism for adding or deleting a application service dynamically. This is implementing wide-ranging, personal preference-oriented services, such as games or electronic commerce requiring high security capability. It also as a programming language is an object-oriented language which is greatly effective in improvement of software productivity. While having such advantages, Java is bottlenecked in a low running speed in such an embedded environment with strict resource restrictions as mobile information devices. This low running speed limits applications to be used, thus killing its potential. This time, we have built the Java runtime environment for embedded equipment which is executed at a high speed by hardware, in order to improve the running speed up to 20 times as fast as conventional software implementation.