In between these days, I may travel up to Old Castle or Umeda, avoiding the use of JR.
My question is
1) For the Osaka Unlimited pass, it states that it covers all subway, new trams and buses. Does that means it cover all lines including JR lines and Nankai railways lines? It also states that if we want to have reserve seats, we need to buy necessary tickets. Does that means we have to pay an entire new one way ticket with reserve seat or just top up the amount to have a reserve seat?
1) The Unlimited pass does not cover JR lines and only covers the Nankai line between Sakai and Namba stations on the one day version, it does not cover the section from Kansai Airport to Sakai. The two day version is only valid for city buses, New tram and subways, it does not cover private railways:
http://www.pia-kansai.ne.jp/osp/en/03_kukan.phpFor reserved seats you would only pay the reservation charge.
2) As clearly stated on the web site, the Unlimited Pass is available for either one or two days only. The Multiple ride card is a "pay as you go" card (fare is deducted for individual journeys), it is not a pass and does not cover JR or private railways.
3) Yes.
4) I am pretty certain that children under 5 travel free.
5) This is just the aquarium admission ticket (2,000 Yen) plus a one day subway pass (850 Yen), it only covers the Osaka subways.
To be honest, I really do not think the Unlimited Pass is good value for you. As an example:
Day 1 - From KIX kansai to Namba Nankai using Nankai Ltd Express.
1,390 Yen via Nankai Limited Express Rapit.
Day 2 - From Namba Nankai to Universalcity which will use a JR Yamatoji Line and Nankai Ltd Exp line
Osaka-Namba station to Nishikujo via Hanshin private railway - 200 Yen. Nishikujo to Universal City via JR 160 Yen.
Day 3 - Osaka Namba to Osakako using Chuo line and Hanshin Namba line.
This can all be done quicker by just using the subway with one change - 270 Yen
Day 4 - From Namba Nankai to KIX kansai using Nankai Ltd Exp line.
1,390 Yen via Nankai Limited Express Rapit.