Putting in your stopovers ('o') and transits ('x'), your itinerary is:
According to GCM, this is 21,963 miles (even including the NRT-HND surface segment) and is 12 segments. So it is a valid xCIR22 itinerary
You have three stopovers in Asia and six in total (BKK, SIN, CBR, SYD, LAS and NRT/HND)
The rule* on stopovers is as follows (relevant parts
highlighted):
[Stopovers]
2 FREE STOPOVERS REQUIRED.
NOTE - TEXT BELOW NOT VALIDATED FOR AUTOPRICING.
A MAXIMUM OF 4 FREE PERMITTED ON THE PRICING UNIT.
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ONLY ONE STOPOVER PERMITTED AT ANY POINT.
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TWO STOPOVERS REQUIRED OUTSIDE COUNTRY OF ORIGIN.
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A MAXIMUM OF ONE STOPOVER IN COUNTRY OF ORIGIN.
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A MAXIMUM OF TWO FREE STOPOVERS PER REGION - SWP/ASIA/NORTH AMERICA/SOUTH AMERICA.
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WHERE A PASSENGER DISEMBARKS AT ONE POINT AND RE-EMBARKS AT A SUBSEQUENT POINT ENROUTE THE POINTS COUNT AS A SINGLE STOPOVER.
WHERE THERE IS A SURFACE SECTOR BETWEEN TWO REGIONS THIS WILL COUNT AS A STOPOVER IN EACH OF THE TWO REGIONS HOWEVER FOR THE PURPOSE OF THE TOTAL STOPOVERS PERMITTED THIS WILL COUNT AS ONE STOPOVER ONLY.
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ADDITIONAL STOPS PERMITTED AT AN ADDITIONAL CHARGE PER STOPOVER OF USD150.00.
- ADDITIONAL STOPOVERS MAY NOT BE PURCHASED IN COUNTRY OF ORIGIN.
- ADDITIONAL STOPOVERS RESTRICTED TO TWO STOPOVERS PER REGION.
- CHILD/INFANT DISCOUNT NOT APPLICABLE.
So your six stopovers exceed the maximum four free allowed - so looks like you'll be up for 2 x USD150 for the extra two - one of which will be your third stopover in Asia
Your Tokyo stopover will count as a single stopover
* Seems the fare rules are no longer available on the Oneworld web site
- the stopover rule quoted above has been sourced from KVS
Note that the xCIR26 allows five free stopovers, and the xCIR29SA allows six free stopovers. Both of course at extra cost, but maybe your BA Tier Point/Mileage benefits would justify the extra cost?