The Shin meikai kokugo jiten (新明解国語辞典?, "New clear-understanding Japanese dictionary"), commonly called the Shinmeikai or affectionately the Shinkai-san (新解さん?, "Mr/Ms Shinkai", with the personal suffix -san ), is a popular Japanese dictionary published by Sanseido. They also publish the analogous Sanseido Kokugo Jiten dictionary, a lexicographical sister that shares several of the same editors.
This Japanese language reference work has frequently undergone revisions and republications. The first two editions were called the Meikai kokugo jiten (明解国語辞典?, "Clear-understanding Japanese dictionary"), and the six subsequent ones were published under the current Shin "New" name.
The chief editors of the early versions were Kindaichi Kyōsuke (1882-1971), Kindaichi Haruhiko (1913-2004), Kenbō Hidetoshi (見坊 豪紀, 1914-1992), and most notably Yamada Tadao (山田 忠雄, 1916-1996). The 6th edition, which contains some 76,500 entries, still lists Yamada as chief editor, but was edited by Shibata Takeshi (柴田武) and Sakai Kenji (酒井憲二). The Shinmeikai kokugo jiten is one of the most popular dictionaries among high-school students. According to Sanseido, all the editions have collectively sold over 19,500,000 copies.