Sunny Choi,
This is the address for Top Airline Business Limited:
Umeda, Kita-Ku, Osaka 530-0001
Osaka Ekimae Building 1-3-1 First 3F
Telephone number is 06-6155-8155.
Apparently it's a one minute walk from JR Osaka Station.
Perhaps you could ring and ask them to verify the address! They are open from 13:00 to 21:00.