Japan Odds And Ends Identification Help Needed

I have a few items from Japan that I could use some help identifying.
Any and all help is appreciated.

Stamp 1 is a metered stamp



Date is July 29, 1998?
What does *10* represent/mean?

Stamp 2 is also a metered stamp



Date is January 22, 2007?
What does the *19* represent/mean?

Stamp 3 is an postal stationery aerogram cut corner



Date is April 9, 1968?
When was this aerogram issued?
Are there other values/images in a set that was released at the same time?

Stamp 4 is also postal stationery card cut corner with embossing below the image. I adjusted the contrast/rightness in the second image so the embossing would be more visible.




When was this post card issued?
What is represented by the embossing?
Are there other values/images in a set that was released at the same time?

Thanks in advance for your assistance!

I'm new at stamp collecting so I can not answer your questions. I can inform you they are not Japanese stamps, but Korean.

Japan is Nippon. Nippon is Japan.

Cancellation on the aerogramme is Chosa,Japan. Would that be the railway station?

Iwade is a city in Japan.
Not sure about Isaji.

Congratulations, nice to see stationery spelt correctly
Nice scans.

I have hundreds of meter stamps, some numbers going as high as "68"
Your questions are valid, alas! there are only a handful of Japan specialists on board, whom pop in time to time.

Your questions are subject to specialist Catalogues, which are not in my possession, so we have to wait and hope for a response.

The embossing, if I may hazard a guess, was on a commemorative card, and not that unusual.
The Postmark has me discombobulated, looks similar to a precancel wave I have seen on sheet issues

The indicia card piece, any idea of dating?
My Sakura Catalogue only goes to 2008
There are many Card sub types, and I must confess, I am not very proficient at navigating Sakura, it can make ones eye glaze over, sometimes.

On an aerogramme Bob? that would be "keeper" if so.

The 10 and the 19 will be the year of the Emperor's reign I'd say.

Aerogramme:
Yes, that's the date. First issued 1 April 1966 but there are 2 earlier without NIPPON in the indicium, 2 after with NIPPON. This is a standalone issue.

As mentioned, "Nippon" is a dead giveaway, but when you don't have that clue (?), look for this figure-8 symbol:




It's on all of the items, above.

The OP knows these are Japanese, but I point this out for any help it gives someone.

Certainly Heisei 10 = 1998 and Heisei 19 = 2007, so that fits. I have a Japanese meter stamp on a piece of mail from January of this year with the number *31* on it, and since Heisei 31 = 2019 (actually just the first four months of 2019), Bobby's theory still holds.

But if the number represents the year of the Emperor's reign, then Rod couldn't have any going as high as 68, since the longest reign era (Shôwa) only went up to 64 (= 1989).

So either Rod is mistaken about the 68, or the number represents something else.

I love this forum.
There are some smart cookies here.........
I have 4, 5, 05, 6, 09, 15,16,17,18,19, and 63



Rod was mistaken........63 was it

And since Shôwa 63 = 1988, that seems to confirm it!



I think it must be. The only Chosa that I can find in Japan is Chôsa Station in Aira City, Kagoshima.

As for Isaji, there's an Isaji-chô (chô or machi being a "town" or district) in the Nishi Ward of Hamamatsu City, Shizuoka. And it's written with the same characters.

https://www.japanpostalcode.net/cp1...shi-shizuoka

Note that some of Rod's examples have the date as year-month-day, whereas others have it as day-month-year. Having the year of the Emperor's reign on there can really help to determine which order is being used!

This thread got me thinking about a couple of things.

Since Shôwa 64 ended with the death of Emperor Shôwa (Hirohito) on 7 January 1989, meter stamps with *64* on them, used for only a week, must be fairly rare.

And how soon after the Emperor's death did the meters get shifted over to *1*? The next day? I would imagine that the Japanese government, in the age of modern communications technology, got the word out pretty quickly, but did any post offices fail to get the message and shift the meters over later? Unlike this year's change from Heisei to Reiwa, which was occasioned by an abdication and planned well in advance, era changes occasioned by an Emperor's death would have caught the populace by surprise.

For that reason, it would be interesting to see Japanese meter stamps from 8 January 1989. Postmarks, too. I'd especially like to see postmarks from the first days of the Taishô and Shôwa eras (30 July 1912 and 25 December 1926, respectively).

WOW, Thank you to everyone who has participated. The information provided has been helpful and very informative for both beginners and myself. Among other things I have learned that 'Shôwa' means 'Era'. A week ago or so I was trying to identify some Japanese revenue stamps. Again, with assistance from this forum, I discovered I had examples from different 'Shôwa' series; now I understand what that means I'll use the information provided to create pages for the stamps.
The 41y post card is still a bit of a mystery. Unfortunately all I have is the cut corner as shown.
Cheers and Merry Christmas to all