*You can repeatedly study questions in the common field and the field of preparing presentation materials in the quiz format, which are published in the official collection of questions "Preparation of documents for the PC proficiency test by the Japan Chamber of Commerce and Industry, utilization of data, preparation of presentation materials, and collection of official questions on the 3rd level knowledge subjects)" (paper book) authorized by the Japan Chamber of Commerce and Industry. Let's aim to pass the examination by establishing knowledge through learning with this application! Support Information After purchasing the product, please contact our support center. * For information on inclusion of dictionary contents, contact the publisher. - Support Center reception hours: 10: 00 ~ 18: 00 Phone: 0120-77-1970 * During the New Year holidays, we will be closed from January 3 to December 29. Specify the number of problems to learn! You can start learning by specifying either all questions or any number of questions.