I'm intend to go from Osaka Kansai international airport to Matsue city by bus (the cheaper way).
Can you please tell me or direct me where from can I take this bus/buy a ticket to this bus? Any other relevant information/recommendations will help!!!

Thank you very much for the answer! It helps a lot!!!

When you speak about "Osaka bus station" you mean Shin-Osaka/Umeda? So I should take another train from Kansai airport to these stations? Do you know what are the best way to get there?

Unfortunately I can't understand Japaniese..can you please tell me what is the difference between the first two bus time tables you've sent me in the link?
Do you know whether I can get the English version of the timetable?

The bus stops at both Osaka/Umeda Station and at Shin-Osaka Station. The exact location in Umeda is
"Hankyu Sanbancho" bus stop in front of the Hankyu Umeda Station:
http://www.chugoku-jrbus.co.jp/annai/img/3-4_img_noriba...

So I should take another train from Kansai airport to these stations? Do you know what are the best way to get there?

The options are explained here:
http://www.japan-guide.com/e/e2033.html

I personally would probably take the direct JR rapid train from Kansai Airport to Osaka Station.

can you please tell me what is the difference between the first two bus time tables you've sent me in the link?

The first is from Izumo to Osaka and the second is in the opposite direction.

o‰_Žs‰w means Izumo-shi Station
Œ]‰w means Matsue Station
V‘åã means Shin-Osaka
ã‹}”~“c ‘åã means Umeda/Osaka

ã‹}’†, ‘JR and ˆê”š refers to the operating bus company (can be ignored).

Do you know whether I can get the English version of the timetable?