$ cat Le04.exe | grep "瑞風　天堺"

$ echo "瑞風　天堺" | iconv -t UTF-16LE | xxd
00000000: 5e74 a898 0030 2959 3a58 0a00            ^t...0)Y:X..

$ cat Le04.exe | grep `echo "瑞風　天堺" | iconv -t UTF-16LE`

$ cat Le04.exe | grep `echo "瑞風　天堺" | iconv -t UTF-16BE`

$ cat Le04.exe | grep `echo "瑞風　天堺" | iconv -t Shift-JIS`

$ cat Le04.exe | grep `echo "瑞風　天堺"`

$ cat Le04.exe | grep `echo "瑞風　天堺" | iconv -t Shift-JIS`

$ cat Le04.exe | grep `echo "瑞風　天堺" | iconv -t UTF-16LE`

$ cat Le04.exe | grep `echo "瑞風　天堺" | iconv -t UTF-8`

$ cat Le04.exe | grep `echo "瑞風天堺" | iconv -t UTF-16LE`

$ cat Le04.exe | grep `echo "瑞風天堺" | iconv -t UTF-16BE`

$ cat Le04.exe | grep `echo "瑞風天堺" | iconv -t Shift-JIS`

$ cat Le04.exe | grep "Zuifeng Tenkai"

$ cat Le04.exe | grep "Zuifeng"

$ cat Le04.exe | grep "Tenkai"