Welcome to FT Knusper

OKA? Osaka = OSA or KIX

Unfortunately you can not take more than one sector between a zone, in this case you are travelling Asia-SW Pacific-Asia-SW Pacific.

I'm not sure why you would want to open jaw (surface) between Japan and New Zealand. To buy that sector is not cheap!

Suggest SIN-HKG-KIX//NRT-SYD-AKL-SYD-HNL etc. with one SYD a transit.

// = open jaw/surface

Be aware that each open jaw counts as a sector towards the maximum permitted of 16. It would be much cheaper to buy a sidetrip to CNS than it would to buy NRT/AKL.

With regard to the taxes/fuel surcharges I suggest you play around with valid routings on http://matrix.itasoftware.com/ which allows you to view these charges and switch codeshares to try and reduce the total bill.

Good luck and enjoy!