Bus from osaka station to Kawaguchiko Station

Hi.

I will travel to mount fuji by bus from Osaka station.

May I know where the place to buy bus ticket for fujikyujko/kintetsu bus nearby osaka?

At the Kintetsu Highway Bus Center near Osaka-Uehonmachi station.

You can book and pay via Willer web even fr out of Japan.
http://willerexpress.com/st/3/en/pc/bus/route/calendar.php?oR=1817013&...
Booking starts only one month before fr travel date, click calender date.
Also read the FAQ and more. (jump to page top or bottom)

That route bus name is "Fujiyama-liner" need booking in advance, (no "seat No." booking)
http://www.kintetsu-bus.co.jp/en/express/routelist/route_higahishizuok...
http://bus-en.fujikyu.co.jp/highway/detail/id/9
("81-" means int'l call)
two bus companies "Kintestu(thin-green)" and "Fujikyuko(white)" shared,
https://pbs.twimg.com/media/DKaLAAjUIAARdwS.jpg
https://pbs.twimg.com/media/C8QLU1UUMAQdv0b.jpg
(NOT "fujikyujko", "Fujikyuko" = "Fujikyu bus" as nick enough, kyuko means just "Express")

Dep bus stop is here. (No ticket sales counter)
http://willerexpress.com/st/share/lib/php/location/index.php?busStopId...
https://goo.gl/maps/5rjRjnt73Rv
https://goo.gl/maps/4rjGW6JUCSC2
http://www.geocities.jp/yakumobus/bus/busterminal/kansai-btp/higashi-u...
http://ekilog.info/wp-content/uploads/CIMG0122.jpg
https://igx.4sqi.net/img/general/600x600/1163123_cdqG9jDlFw9z7H8RsRvH-...
https://goo.gl/qYL6fB

If you can read Japanese, or have a friend of Japanese speaker see the JP web.
http://www.kintetsu-bus.co.jp/highway/routelist/route_detail.php?no=14
http://bus.fujikyu.co.jp/highway/detail/id/9