Japan offers a wide range of accommodation depending on your preferences, they have hotels, ryokans (traditional Japanese inn), guesthouses / hostels and apartments for rent. If you are into a budget traveler, I recommend hostels and getting a dormitory type room. 

Dormitory is a sleeping room containing several beds, if you don't have any problem in sharing a room with the strangers, then it's good to consider using dorms as your accommodation in your trip as it is cheaper especially when you are alone or doing solo trips.

In Osaka, you may consider Osaka Hana Hostel. I stayed here when I watched a concert: http://www.lostinreveries.com/2019/08/bigbang10-concert-0to10-in-japan.html

Osaka Hana Hostel is located at the heart of Shinsaibashi, a main shopping district where you can easily spend the whole day as it is also connected to Dotonburi. There are also restaurants and shops nearby and just 2 minutes walk from Subway Midosuji Line "Shinsaibashi" station.

I stayed at in 6-Bed Female Dormitory Room. Aside from dormitory which is all for sharing, they also offers private room with bath. They require you to put your shoes first at the shoe box near entrance and use a slipper provided by the hostel before you enter.

The dormitory-style rooms feature curtains which is a good thing because you still have privacy even though you have roommates, a bed lights, plug outlets and locker box in each bunk. The bathrooms, shower rooms and lavatory for dorms are shared too but it was clean and comfortable to use. 

Moreover, guests can use the free-use computers and enjoy complimentary coffee/tea at the lounge, they can also use the shared kitchen to cook their own meals and store food in the fridge. 

They have Japanese Sake Bar on the 1st floor, shared lounge at the 2nd floor and 7th floor, a coin-launderette (200 yen for washing machine and 100 yen for dryer) and a vending machine for drinks. They also have items for rent like bike, umbrellas and bath towels and other toiletries.

*There is no elevator from 1st floor to 2nd floor. Please note that you will have to carry your luggage up. From 2nd floor, you can use the elevator.

HOW TO GO TO OSAKA HANA HOSTEL FROM KANSAI INTERNATIONAL AIRPORT?

1. VIA BUS (Kintetsu Uehommachi/Shinsaibashi)

- Fare: 1,550 YEN

- Go to BUS STOP. (Terminal 1 / 1st floor: Outside) / (Terminal 2 / Outside Arrival Hall)

- Look for BUS: Kintetsu Uehommachi/Shinsaibashi (BUS NO. 7 - TERMINAL 1 / BUS NO. 8 - TERMINAL 2); They start at Terminal 2 from 5:47AM to 10:32PM and Terminal 1 from 6:00AM to 11:37PM. You may check bus timetable here: http://www.kate.co.jp/en/timetable/detail/UH

- Drop off at the last stop which is SHINSAIBASHI (Hotel Nikko Osaka)

- Walk from Hotel Nikko Osaka to Osaka Hana Hostel for 2 minutes.

2. VIA TRAIN (Nankai Airport Line: The Airport Express & Rapi:t & Subway)

- Fare: 920 YEN - adult or 460 YEN - child (Airport Express) / 1130 YEN - adults or 570 YEN - child (Rapi:t regular seat)

- Fare: 180 YEN for SUBWAY from NAMBA to SHINSAIBASHI

- Go to Kansai Airport Station . From Terminal 1: There are North exit and South exit for International Arrival Floor in the 1st floor. Go to 2nd floor by escalator or elevator. Follow the sign for Kansai Airport station. Front side is Nankai Kansai-Airport station.

(Back side is JR) / From Terminal 2, International Arrival Gate in the 1st floor. lease go out the Terminal 2, and go to the left Bus stops. Get on the free shuttle bus to Kansai-Airport Terminal 1 / Aeroplaza. About 7 min. / It operates 2min.~8min. (midnight is every 1 hours). Please go up to the 2nd floor by escalator or stairs. Through the Aeloplaza and turn left and go straight following sign going to Nankai Kansai Airport Station.

- Drop off the last station: Namba Station.

- Walk for 8 mins for SUBWAY MIDOSUJI LINE FOR SHIN-OSAKA.

- Get off at SHINSAIBASHI STATION exit 8 or 7 (for elevator)

- 2 mins walk to OSAKA HANA HOSTEL.