planning visit to Japan in August 19

Hi Scarlet!

Lets first take a look at your projected ticket costs:

1. Kansai airport > Shirahama: ¥4800, (134mins, 143km)
2. Shirahama > Nara: ¥5960, (177mins, 204km)
3. Nara > Kyoto: ¥690, (44mins, 41km)
4. Kyoto > Arimaonsen: ¥4160, (82mins, 92km, incl. non-JR parts)
5. Arimaonsen > Osaka: ¥2630, (67mins, 48km, incl. non-JR parts)
6. Osaka > Kansai airport: ¥3340, (57mins, 64km)

Approx. JR ticket costs: ¥14790

Based on these costs I think I'd recommend:

Day 1-4: Kansai WIDE area pass @ ¥7000 for 4 days (saving ¥4450)
Day 5--end: This is a little more tricky as there is no simple answer. Possibly look into the Kansai Thru Pass (coverage map) to get you around Kyoto by subway/bus and to Arima onsen and back, or look into a ICOCA prepaid card to use until you leave from Osaka.

You can purchase all these from Kansai Airport, or online. Please check the links for more information.

Hope this helps!