Japanese i s a p e c u l i a r l anguage among the thousands of l anguages i n the wor ld . There e x i s t o n l y two of t he same c l a s s ! J apanese and Korean. Japanese i s w r i t t e n bo th i n Chinese c h a r a c t e r s ( i deog raph ) and i n Kana (Katakana and HAragana phone t l o symbols) I n m i x t u r e w i thou t any space . Moreover, 0 h i neee c h a r a c t e r s i n Japanese have, i n most c a s e s , s e v e r a l r e a d t n g s and p l a y s e v e r a l r o l e s depending on the c o n t e x t and l e t t e r s t r i n g c h a r a c t e r i s t i c s . So f o r w r i t t e n J a p a n e s e , i t wan v e r y d i f f i c u l t t o ee~nen t l e t t e r s t r i n g and e x t r a c t adequate te rms from s e n t e n c e and to gave them c o r r e c t r e a d i n g s a u t o m a t i c a l l y , which a~e i n d i s p e n s a b l e f o r t e r m i n o l o g y , a u t o m a t i c r e a d i n g , au toma t i c i n d e x i n g , k e y b o a r d i n g from o n l i n e t e r m i n a l s o t h e r wise more t h a n 2 ,000 c h a r a c t e r key-board As n e c e s s a r y .