Hideki Ogura

• "Gendai Nihongo kakikotoba kinkō kōpasu" keitairon jōhō kiteishū
• "Gendai Nihongo kakikotoba kinkō kōpasu" keitairon jōhō kiteishū
• "Gendai Nihongo kakikotoba kinkō kōpasu" keitairon jōhō kiteishū
• "Gendai Nihongo kakikotoba kinkō kōpasu" keitairon jōhō kiteishū
• "Gendai Nihongo kakikotoba kinkō kōpasu" keitairon jōhō kiteishū
• Nihongo no goi, hyōki