RetireJapan

From what I understood based on my nenkin teikibin, I am getting more than was stated in the last teikibin, maybe because they had yet to include my final months of payments. In the end, I got a certificate, quite attractive, that listed my annual kokumin nenkin, and the amount was 40,000 yen higher than the previous teikibin.
I am also getting shigaku kyosai. All the notifications I received from them listed an annual pension that turned out to be lower than I will actually receive (better than the opposite!).
As I indicated, my main purpose in making my original post was to let other people know a ballpark figure for pensions, especially for people in a similar situation. I told a 55-year-old colleague, and he was shocked at how low the pension is. He just didn't know.

Yeah, I'm expecting 100-200,000 yen a month for me and my wife. This is not enough to live the life I would want to, so am saving/investing to make up the difference.

I meet a lot of people who are not

This is a fascinating topic. Thank you, Zara for publicising these numbers, it's certainly enlightening. I didn't even know there was such a thing as 介護保険.

I've also read somewhere that if you're employed past 65 and making a certain amount of money, your nenkin will be reduced too.

I am working after age 65 -- out of necessity!!! I will let you know if my nenkin is reduced due to my modest income. I hope it is only the kokumin nenkin (negligible to begin with) and not the shigaku kyosai nenkin.
Some other things to consider in your first year of retirement:
1. I had to pay more than 500,000 yen in taxes, because the 2019 tax is based on my 2018 income.
2. My health insurance payments are no lower than last year, either (more than 30,000 yen per month), also because the payments are based on last year's salary. I am paying through shigaku kyosai, which supposedly is slightly lower.
3. And my kaigo hoken is about 14,000/month.
4. On the bright side: I received 350,000 yen from Hello Work, a one-time lump-sum unemployment payment. It took two visits to Hello Work.

I found a national pension notification (国民年金), so here's my actual yearly number: ¥459,934. That's for 29yrs of contributions.

Divide that by 12 to get the monthly amount, ~¥38,327. But that's paid every other month (so twice that on even numbered months), which is just the way it happens.

As mentioned above, 介護保険 is deducted from this (you'll pay it one way or another anyway). Mine is just shy of ¥20,000 per bimonthly payment, not quite ¥10,000 on a monthly basis.

(And then deductions for taxes, which also need to be paid one way or another.)

The figures in this thread are very interesting, congratulations to those of you who have retired!
Personally I am planning retirement without even considering the state pension, it will just be bonus money as I'm not convinced I will be getting it by the time I retire in ~30 years (assuming no early retirement)
The more I watch the current government flail around the more certain I am that in 30 years there will be nothing to take or, the system will have been restructured in such as way as to make the monthly distribution so low as to be irrelevant.