That gets worse as you get farther out of the cityTLDR: values depreciate, inflation has gone basically nowhere in Japan for a long time, the supply of housing is pretty good compared to demand (unlike the US) and that's because of flexibility with rezoning and development, taxes on rental income are high. 

Security systems are easily outsmarted, that’s the point of the initial visit, to case the joint. 

For property owners in this area, what have you seen in terms of supply and demand. 

If you are priced well and the condition is great barring there is not a ton of supply, then you will sell quickly!  

So, your focus may need to pivot from high rental cash flow to little to no cash flow as a rental with an appreciation upside.I would recommend taking your $150K to $200K and securing a solid equity position in something that will cover its expenses and maybe provide a small cash flow, but then is poised to appreciate nicely over the course of the next several years. 

Nothing you mention is "ordinary" and you should charge for all of it. dodged a bullet there thats a very good price take it from the security deposit and call yourself lucky. 

Here are some key elements to include:Lease Agreements: Ensure your contracts reflect the latest laws, such as notice periods for entry or rules around security deposits.Fair Housing Compliance: Familiarize yourself with federal, state, and local fair housing laws to avoid discriminatory practices.Property Standards: Regularly inspect your properties to ensure they meet safety and habitability standards.Tax Documentation: Keep accurate records to comply with tax reporting requirements.4.

Typically, co-op's are less valuable than condos for a number of reasons such as supply/demand, lack of investor interest, older units, estate planning issues, financing and board policies. 

My goal is to create financial security for retirement.

Depending on your debt to income, you might have to sell or have an executed lease to secure financing to buy the second home.