In May 2023, the ASBJ issued an exposure draft of accounting standard for lease transactions (new lease accounting standard). If the new lease accounting standard is applied in accordance with the exposure draft, the scope of on-balance sheet treatment will increase significantly, which is expected to have a significant impact on the practices of various departments as well as the accounting department. On the other hand, many companies are not yet aware of the contents of the draft and may not yet have a clear understanding of how they will be required to respond to the new lease accounting standard. Therefore, this document summarizes the changes in the new lease accounting standard from the current standard and what kind of impact is expected, focusing on key points in an easy-to-understand manner. We hope that this document will be of some help to those who are considering how to respond to the new lease accounting standard.