[だい, dai] (n) (1) substitution; (2) material; (3) price; (4) margin (e.g. for stapling, etc.); area required for something; (5) (arch) (See 段) shiro (unit of land area equal to one-fiftieth of a tan; ~19.83 m.sq.)#376
[ないち, naichi] (n) (1) (sens) within the borders of a country; domestic soil; (2) inland area; (3) (during the WWII era) Japan proper, as opposed to its overseas colonies; interior of country; homeland; (4) (in Hokkaido and Okinawa) the "mainland" parts of Japan (Kyushu, Shikoku, Honshu)#16236