(1)To summarize, market information for every single series has a possibility to have execution price with the 4 digit decimal.
The single series doesn't have a possibility to have the execution price with 4 digit decimal.
But market price information(BD70, BD2) includes single series execution price and the execution price of the leg of TMC.
As the execution price of the leg of TMC has a possibility to have 4 digit decimal,
market price information(BD70, BD2) of the leg of TMC has a possibility to have 4 digit decimal.
Since TMC can be made from every single series,
market information for every single series has a possibility to have execution price with the 4 digit decimal.
(2)
With the series written in "4.6.6.5. Implied/Out Functions", TMC can be executed with normal series.
As you see, Nikkei225 Option is not in the scope of a such execution.