Here is a rare document that accompanied the 1894-5 War Dispatch medal. It is printed on
thin paper and has no personal names attached. It is a guide to wearing that specific medal. I
am not sure if later medals had this kind of book or not. Perhaps because the 1894-5 War
Medal is one of the earliest Japanese medals, this kind of instruction was important.
However, I suspect that other commemorative and war medals had a similar document
attached.
When I have more time, perhaps I will do a full translation. For now, though, I'd like to show
the first few lines.
1. Guide to Wearing the War Dispatch Commemorative Medal
2. Meiji 27-8 [1894-5] War Dispatch Commemorative Medal: Regulations and Permitted Ways to Wear
3. Meiji 28 [1895] October 8th,
Prime Minister Ito Hirofumi, Imperial Edict #143.
4. Meiji 27-8 [1894-5] War Dispatch Commemorative Medal Regulations

Basically it includes all the rules about where  to put the medal on clothes, who can wear it, when one
cannot wear it, etc. I'll try and get the details here at a later date.
Here are two paper items associated with the 1928 Showa Enthronement Medal. The
smaller item is the paper wrap and can be found fairly easily. The larger document is
from the Awards and Medals Department and reads

"On the obverse of the Emperor Enthronement medal is the word 'Banzai' and on the
reverse is 'Emperor Enthronement Medal, Showa 3, November.' These are written in the
hand of
Prince Kan'in Kotohito, Official Head of the Imperial Attendants."

This man was also Hirohito's great-uncle, having been adopted by Emperor Meiji's father.
WW1 document. Translates as follows (from the right):
"Army Infantry First Class Private Motoyama Masaya. For brave war service in the
Showa 6 to 9 [1914-20], you are awarded the 8th Class Sacred Treasure and a
cash gift of 60 yen. Showa 11 [1936] July 10th. Awards and Medals Department
General Chairman Shimojo Yasumaro, holder of the 3rd rank and 1st Class
Sacred Treasure."
"Army Infantry First Class Private Katakura Tokutsugu. For brave war
service in the Meiji 37-8 Years War, you are awarded the 8th Class
Sacred Treasure and a cash gift of 70 yen. Meiji 39 [1906] April 1st.
Awards and Medals Department General Chairman Viscount Ogyuu
Yuzuru, holder of the 2nd rank and 1st Class Sacred Treasure."
Post-war 6th Class Rising Sun. Posthumous award
1. The Japanese Emperor [awards]

2 Deceased     3. Makino

4. The 6th Class Order of the Rising Sun medal

5. Showa 44 [1969] March 29.

2. Prime Minister Sato Eisaku

3. Prime Minister's Office, Awards and
Medals Bureau Iwakura Norio

4. [This medal has been recorded as]
#1492039
A post-war (Heisei era) Merit Medal document.
Below is a post-war document for the Red Cross Gold Membership medal.
Japan Red Cross insignia bordered by
Imperial paulonia branches
Award Documents
page 5