Medal Ribbon Bars
The War and Commemorative Medals, as well as the Orders, included a ribbon bar to be worn when the
medal couldn't. I think that these were only issued to military personnel, but I could be wrong. I have never
seen civilians wear the bars, though.

Of course, the ribbon bar matched the ribbon of the corresponding medal.
The bars usually had two bendable metal tabs that secured the bar to a longer metal strip, which was then
attached to the uniform. Some were wrapped around the bar and glued tight, and others were sewn together
on the back, sometimes overlapping the neighboring ribbon.

There is a specific order that these should be worn, and you can find the details in my 2nd ebook, available
for 250 yen from my
STORE.

Also see
RIBBONS BARS PAGE 2 for a few more examples.

For some very nice line drawings of these ribbons and others, click on the following three links:

JAPANESE RIBBONS 1                JAPANESE RIBBONS 2                JAPANESE RIBBONS 3
1.  1874 Formosa Expedition         2. 1894-5 China War                            3. 1900 Boxer War
4. 1914-15 War Dispatch                5. 1934 Manchurian Incident             6. 1939 China Incident
7. 1889 Imperial Constitution         8. 25th Wedding Anniversary            9. Crown Prince's Voyage to Korea
10. 1920 First National Census     11. 1928 Showa Enthronement        12. Capital Rehabilitation
13. Red Cross
14. 1904-5 Russia War                                 15. 1914-20 War Dispatch   
16. 1944 Great East Asia War
17. 1912 Korea Annexation                         18. Taisho Enthronement
19.  1920 First National Census                  20. 1940 National Foundation
1 row. Note that the ribbon to the far right is for the exceedingly rare Manchukuo Imperial National Foundation Medal.
2 rows. The 2nd ribbon on the lower row is for the 1939 Inner Mongolia
National Foundation Medal.
3 rows, 9 ribbons
I think the bar for a single service ribbon is a bit rare.
This is the ribbon for the 1934 Manchurian Incident War Medal.
Single row, 2 ribbons.
1934 Manchurian Incident War Medal & Red Cross.
Nice grouping of medal ribbons in the correct order. There is also a thick cardboard sleeve that
appears to be the original case for the medal ribbon bar.
The medal ribbons:
Order of the Rising Sun
Order of the Sacred Treasure
1928 Showa Enthronement Medal
1931-34 Manchurian Incident Medal
1939 China Incident Medal
1940 2600th National Foundation Medal
1933 Manchukuo National Foundation Medal
Red Cross Medal

Order of the Rising Sun Decoration (class unknown)
Order of the Sacred Treasure Decoration (class unknown)
1904-5 Russia War Dispatch Medal
1915 Taisho Emperor Enthronement Commemorative Medal
1920 WW1 Victory Commemorative Medal
1914-20 WW1 Siberia Dispatch Medal
1928 Showa Emperor Enthronement Commemorative Medal
Order of the Sacred Treasure Decoration (class unknown)
1928 Showa Emperor Enthronement Commemorative Medal
1931-4 Manchurian Incident War Dispatch Medal
1934 Manchukuo National Foundation Medal (upside-down)
Red Cross Member Medal
Service ribbons with metal bar. From the right:

Order of the Sacred Treasure Decoration (class unknown)
1928 Showa Emperor Enthronement Commemorative Medal
1940 2600th National Foundation Commemorative Medal
Note how these ribbons wrap around the metal hanger. Many others have the
bendable tabs at either end that secure the ribbons.

Order of the Rising Sun Decoration (class unknown)
1914-5 (or 1914-20)  War Dispatch Medal
1920 WW1 Victory Commemorative Medal
1920 First National Census Commemorative Medal
Red Cross Member Medal
A ribbon bar with an amazing 14 medals. Included are, in order,

Order of Rising Sun
Order of Sacred Treasure
Order of Pillars of State (Manchukuo)
Unknown foreign order
1904-5 Russia War Dispatch Medal
1915 Taisho Emperor Enthronement Commemorative Medal
1914-5 Tsingtao War Dispatch Medal (possibly the 1914-20 War Medal)
1928 Showa Emperor Enthronement Commemorative Medal
1931-4 Manchurian Incident War Dispatch Medal
1939 China Incident War Dispatch Medal
1940 2600th National Foundation Commemorative Medal
1932 Manchukuo National Foundation Merit Medal
1935 Imperial Visit to Japan Commemorative Medal (Manchukuo)
Red Cross Member Medal
Overlapping ribbons that are sewn on the reverse.
A ribbon bar with 7 medals. It is a bit soiled.
Included are, in order,
Order of Sacred Treasure
Order of Golden Kite
Order of Rising Sun
1931-4 Manchurian Incident War Dispatch Medal
1939 China Incident War Dispatch Medal
Japan Red Cross Member Medal
Manchukuo Red Cross Member Medal
A ribbon bar with 6 medals. Included are, in order,

Order of Sacred Treasure
Order of Rising Sun
Unknown foreign order
1904-5 Russia War Dispatch Medal
1915 Taisho Emperor Enthronement Commemorative Medal
1914-5 Tsingtao War Dispatch Medal (possibly the 1914-20 War Medal)
A ribbon bar with 7 medals. Included are, in order,

Order of Sacred Treasure
Order of Rising Sun
Unknown foreign order
1904-5 Russia War Dispatch Medal
1915 Taisho Emperor Enthronement Commemorative Medal
1914-5 Tsingtao War Dispatch Medal (possibly the 1914-20 War Medal)
1928 Showa Emperor Enthronement Commemorative Medal
A ribbon bar with 10 medals. Included are, in order,
Order of Golden Kite
Order of Rising Sun
Order of Sacred Treasure
Order of Auspicious Clouds (Manchukuo)
1915 Taisho Emperor Enthronement Commemorative Medal
1928 Showa Emperor Enthronement Commemorative Medal
1931-4 Manchurian Incident War Dispatch Medal
1939 China Incident War Dispatch Medal
1940 2600th National Foundation Commemorative Medal
Japan Red Cross Member Medal
A ribbon bar with 2 medals. Included are, in order,

Order of Auspicious Clouds (Manchukuo)
1939 China Incident War Dispatch Medal
Order of the Golden Kite (class unspecified)
Order of the Rising Sun (class unspecified)
1894-5 China War Dispatch Medal
1900 Boxer Rebellion War Dispatch Medal
1904-5 Russia War Dispatch Medal
1915 Taisho Emperor Enthronement Medal
1928 Showa Emperor Enthronement Medal