Since OP is transiting at NRT, Japanese duty free allowance is irrelevant. At NRT the rule regarding liquid through the transit security has changed this past April 9.

Before April 9 of this year no liquid in a container larger than 100 mL was allowed through the transit point at NRT. All liquid items in a container smaller than 100 mL had to fit into one 20 cm x 20 cm plastic bag.

However, on April 9 this year the rule has changed and now liquids purchased at duty free stores at other airports are allowed through the transit security point at NRT. However, the website of Narita Airport indicates that liquid items form duty free shops have to be in STEB. Not all airport duty free shops do provide STEB so carrying duty free liquid through NRT transit point looks as still limited situation.

I think above is the reason there are conflicting information out there regarding liquid through transit point at NRT. The rule has changed few months ago.

I think best option for OP is as other have mentioned already, buy a bottle of wine before the trip and carry those in checked baggage.