Scarcity Scale
1 dot is common. 5 is extremely rare.
Established to commemorate the dispatch of Japanese forces to Siberia.

The attached bar says 'War Medal.' Peterson says that no one could receive both the 1914-15 War
Medal and the 1914-20 War Medal, but I have two award documents that show a Navy sailor receiving
both. (See the document for this medal below. The other one is on the
1914-15 War Medal page.)
And the actual Imperial Rescript establishing the later medal says that one could not WEAR both; the
later medal must take precedence. So Peterson made a translation error.

OBVERSE: Crossed flags and Imperial mum crest. Below are Imperial Paulonia branches.
REVERSE: Inscribed 'Taisho 3-9 [1914-20] War Service.'
The 1914-1920 War Medal
大正三年乃至九年戦役従軍記章
1. Record of Awarding the 1914-1920 War Medal.

2. Navy Petty Officer, 2nd Class, Yoshida Youzou.

3. Given the 1914-1920 War Medal

4. Taisho 9 [1920] November 1.
The award document
Representation of the medal at the bottom
Imperial mum crest and chrysanthemum branches at the top
Border of artillery and anchors
Left side of document
Right side of document
1. Medal Award Department, General Chairman, Holder of the 4th Class
Rising Sun and 2nd Class Sacred Treasure, Count Kodama Hideo.

2. The awarding of this 1914-1920 War medal has been recorded as
#143775.

3. Medal Award Department, Secretary, Holder of the 5th Class Rising
Sun and 4th Class Sacred Treasure, Yokota Gosuke.

4. Medal Award Department, Secretary, Holder of the 7th Class Rising
Sun, Akamine Tetsuo.
In the center:
'Great Japan, Imperial Awards &
Medals Department.'
Fitted white velvet insert.
Attached bar
The basic design elements on the obverse are the same, but if
you take  a close look, you will see a number of differences.
For example, the mum petals and the tops of the branches.

Of course, the reverses are easy to tell apart even if you cannot
read Japanese. The 1914-1915 War Medal (top) has one row
of text on the reverse, but the 1914-1920 War Medal (bottom)
has two rows of text over a single row.
Obverse
Reverse
Ribbon bar