Where it comes from
The line in the source
"productTitle": "拡張パック「ウルトラサン」", "releaseDate": "2017年12月 8日（金）", "description": "カード5枚入り" Explore / Figure
Record
JP expansion-pack release date, 8 December 2017 | 2017 | year to February 2018 (Mar 2017-Feb 2018) | print-year Apr 2017-Mar 2018
8 December 2017 8 December 2017 | 2017 | year to February 2018 (Mar 2017-Feb 2018) | print-year Apr 2017-Mar 2018
FiledTaken from a filing, a registry or the company’s own published page.