Eiken-ou - 4-kyuu Hen (日本語: 英検王 4級編) is a Japanese educational game released for the Nintendo DS in 2009. Developed by the company Success, it is designed to help students prepare for the Japanese Eiken 4th Grade English Proficiency Test. The game focuses on improving the player’s knowledge in the areas of English grammar, reading and listening comprehension, and vocabulary. The game is divided into three main sections: the Grammar Lesson, the Reading Lesson, and the Listening Lesson. In the Grammar Lesson, the player is presented with a series of questions related to English grammar and is asked to choose the correct answer. The Reading Lesson tests the player’s understanding of English texts, while the Listening Lesson involves listening to English audio and answering questions related to what was heard. The game also features a number of mini-games, such as a crossword puzzle, a hangman game, and a quiz show, which can be used to help players practice their English skills. The game also includes a dictionary, which can be used to look up new words and phrases. In addition, the game offers a variety of rewards, such as medals and trophies, which can be earned by completing various tasks. Eiken-ou - 4-kyuu Hen is an entertaining and educational game that can help players improve their English proficiency and prepare for the Japanese Eiken 4th Grade English Proficiency Test.