What this is
Gross-up at ≈30.6% statutory: 1,117/(1−0.306) ≈ 1,610 pre-tax unrealised gain on market-priced holdings (or deferred hedges). Nintendo 32% share of the +1,117 ≈ 357 (parent-only basis, if equity pickup used this alone).
Where it comes from
Our calculation from other figures in the trainer’s notes: