When investing in high cash-flow markets, I always recommend working with an investor friendly agent so you're able to gain the right insight on the different areas and the risks involved.

They also benefit from strong schools, which can be a huge draw for long-term tenants.While you may not achieve high cash flow immediately in these areas, the property values and rents tend to appreciate steadily over time, aligning well with your goals.

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. 

I have an outdoor pool that easily have 1k+ people using it every season and I never had single complaint due to the water quality.

So advice to get the house against him and he will move out on his own is HIGHLY unlikely.  

With your strong credit score, high income, and solid investment portfolio, you are in a great position to secure financing for an investment property in the U.S., and as they've mentioned above DSCR is something you might want to look at.

And for an OOS, I always advise to keep things simple at start, don't get greedy, go for quality and consistency, then work on maximizing monetization later. 

It's very difficult to get SFR to cash flow these days with interest rates as high as they are.

One of the first deals I did was take down a 26-parcel deal in a highly distressed neighborhood and listed it on the MLS.

Any MF of the quality and size (50 up) I would have been interested in would have been cash flow negative for the next 5 years or so, even with 30% down.