In general, you can get documents provided by the Legal Affairs Bureau, such as the registry, maps, etc., a list of the contents of the lease contract (rent roll), repair history of the building, construction drawings, certificates of building confirmation, certificates of completion, boundary documents, etc. However, there are some transactions where you can get these documents without submitting a confidentiality agreement.
If the property owner is a real estate investment fund company or a large corporation, more information may be available, such as detailed income and expenditure reports, engineering reports, and detailed information on hazardous substances such as soil contamination.