How long the first English booster set of each Pokémon card series followed the first Japanese one

What this is

How long the first English booster set of each Pokémon card series followed the first Japanese one: 811 days for the original Base Set, 4 to 11 months from neo to Black & White, and 54 to 70 days from XY in 2014 onward.

How it’s built

1. Subtracted the Japanese release date of each series' first booster from the English release date of its first main set.

What we assumed

• Community-recorded English dates before 2017 are right.TPC's own English dates survive only for recent series; older dates come from fan databases.
• The first set of a series stands for the series.Later sets in a series can follow at different gaps; the first is the only one dated for every era.

Sanity check

Example: XY launched in Japan on 13 December 2013 and in English on 5 February 2014, 54 days later. Sword & Shield is left out for lack of a kept English date.

Where it comes from

Our calculation from other figures in the trainer’s notes:

• ReportedEn against Japan release lag days, 2022-2026