A n a l y s t s grammar o f Japanese tn the Mu-proJect ts p r e s e n t e d , It is emphasized t h a t r u l e s expressing constraints on stngle linguistic structures and r u l e s for selecting the most p r e f e r a b l e readtngs are c o m p l e t e l y d i f f e r e n t In n a t u r e , and t h a t.