Japanese '者' (U+8005) is replaced with \350\200

[OKUMURA, Akira]

Dear the developers,

$ wdiff input1.text input2.txt

generates a result with a broken word, in which a Japanese character, '者', 
(Unicode U+8005) is replaced with  \350\200 when opening the result in Emacs. 
The sample input files are attached.

Could anyone tell me how to avoid this?

Regards,

-- 
OKUMURA, Akira oxon@mac.com / oxon@nagoya-u.jp
⌘ Junior Associate Professor at
- Institute for Space–Earth Environmental Research (ISEE)
- Kobayashi–Maskawa Institute for the Origin of Particles and the Universe (KMI)
Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
Office/Lab/Fax: +81 (0)52-789-4320/4324/4313
skype:okumura.akira

input1.txt
Description: Text document

input2.txt
Description: Text document