searching on regex in japanese do NOT work

[jack9]

first of all my english is poor .so plz tell me if you dont understand.
my environment :32bit public_810a on windows10 64bit

plz look at this picture
pic1
:Searching in English work correctly.
pic2
:Searching on regex in english searching also work.
pic3
:Searching in japanese work correctly.
pic4
:But Searching on regex in japanese do NOT work.

pic5
:my search setting.other search setting is defalut