Chinese and Japanese Coins [επιλυμένο]

Forgive me for not providing measurements, but I cannot find a ruler or tape measure. For scale, I have provided a modern U.S.A. penny.

You all have been so helpful previously in Identifying my few Chinese coins, so I hope that each of these can be identified with a year and location?



Above are the fronts, most numbered by me.

What are they, and when are they from? I'm assuming 1800s-1970s for them.

And here are the backs:




Thank you in advance for any information you can give.

Nr. 5 = Taiwan, 5 jiao 1954 (https://en.numista.com/catalogue/pieces4476.html)

Nr. 6 = Japan, 1 sen 1920 (https://en.numista.com/catalogue/pieces5434.html)

Nr. 7 = Japan, 5 yen 1951 (https://en.numista.com/catalogue/pieces929.html)

1,2,3. China Empire
1 Cash, Guangxu Boo-Guwang, Years 1890-1899

4. China Empire
1 Cash, Qianlong Boo-chiowan, Years 1736-1800

5. Taiwan
5 Jiao, Year 43 (1954)

I love how you both so quickly identified them. Thanks!