Union Arena Release Dates: Japanese and English Sets 2026–2027
Union Arena sets are released title by title. Where the English site lists the same set, the row pairs the two dates.
Union Arena sets, Japanese and English
Of the 27 products listed, 15 have both an exact Japanese date and an exact English date. For those, the English release came anywhere from 63 days after to 1260 days after the Japanese release (median: 336 days after). Dates marked “day not announced” have only a month from the publisher; they are not counted.
Date confirmed the publisher has announced the exact day. Announced the publisher has announced the product but only the month, or no date yet.
| Product | Japanese release | English release | JP → EN gap | Status | Official sources |
|---|---|---|---|---|---|
| UA07BT / UE20BT UNION ARENA SPECIAL BOOSTER PACK That Time I Got Reincarnated as a Slime [UE20BT]UNION ARENA ブースターパック 転生したらスライムだった件【UA07BT】 | 1127 days later | Date confirmedSame product slug (tsk-1) on JP and NA official sites; JP code UA07BT, EN code UE20BT. JP release is before the window; included because EN release is in the window. | Japanese EnglishChecked November 2, 2026 | ||
| UA10BT / UE25BT UNION ARENA SPECIAL BOOSTER PACK My Hero Academia [UE25BT]UNION ARENA ブースターパック 僕のヒーローアカデミア【UA10BT】 | 1260 days later | Date confirmedSame product slug (mha-1) on JP and NA official sites; JP code UA10BT, EN code UE25BT. JP release is before the window; included because EN release is in the window. | Japanese EnglishChecked November 3, 2026 | ||
| UA26BT / UE21BT UNION ARENA BOOSTER PACK The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You [UE21BT]UNION ARENA ブースターパック 君のことが大大大大大好きな100人の彼女【UA26BT】 | 693 days later | Date confirmedSame product slug (rly-1) on JP and NA official sites; JP code UA26BT, EN code UE21BT. JP release is before the window; included because EN release is in the window. | Japanese EnglishChecked November 2, 2026 | ||
| UA30BT / UE31BT UNION ARENA SPECIAL BOOSTER PACK ARKNIGHTS [UE31BT]UNION ARENA ブースターパック アークナイツ【UA30BT】 | 931 days later | Date confirmedSame product slug (ark-1) on JP and NA official sites; JP code UA30BT, EN code UE31BT. JP release is before the window; included because EN release is in the window. | Japanese EnglishChecked November 3, 2026 | ||
| UA31BT / UE29BT UNION ARENA BOOSTER PACK Puella Magi Madoka Magica [UE29BT]UNION ARENA ブースターパック 魔法少女まどか☆マギカ【UA31BT】 | 882 days later | Date confirmedSame product slug (mmm-1) on JP and NA official sites; JP code UA31BT, EN code UE29BT. JP release is before the window; included because EN release is in the window. | Japanese EnglishChecked November 3, 2026 | ||
| EX10BT / UEX07BT UNION ARENA BOOSTER PACK Attack on Titan Vol.2 [UEX07BT]UNION ARENA ブースターパック 進撃の巨人 Vol.2【EX10BT】 | 448 days later | Date confirmedSame product slug (ex_aot) on JP and NA official sites; JP code EX10BT, EN code UEX07BT. JP release is before the window; included because EN release is in the window. | Japanese EnglishChecked November 2, 2026 | ||
| UA40BT / UE24BT UNION ARENA BOOSTER PACK Re:ZERO -Starting Life in Another World- [UE24BT]UNION ARENA ブースターパック Re:ゼロから始める異世界生活【UA40BT】 | 448 days later | Date confirmedSame product slug (rez-1) on JP and NA official sites; JP code UA40BT, EN code UE24BT. JP release is before the window; included because EN release is in the window. | Japanese EnglishChecked November 2, 2026 | ||
| UA43BT / UE19BT UNION ARENA BOOSTER PACK SAKAMOTO DAYS [UE19BT]UNION ARENA ブースターパック SAKAMOTO DAYS【UA43BT】 | 273 days later | Date confirmedSame product slug (smd-1) on JP and NA official sites; JP code UA43BT, EN code UE19BT. JP release is before the window; included because EN release is in the window. | Japanese EnglishChecked November 2, 2026 | ||
| UA52BT The Eminence in Shadow (translated title)UNION ARENA ブースターパック 陰の実力者になりたくて！【UA52BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 2, 2026 | |
| UA53BT / UE22BT UNION ARENA BOOSTER PACK CHAINSAW MAN [UE22BT]UNION ARENA ブースターパック チェンソーマン【UA53BT】 | 70 days later | Date confirmedSame product slug (csm-1) on JP and NA official sites; JP code UA53BT, EN code UE22BT. | Japanese EnglishChecked November 2, 2026 | ||
| UA50BT / UE23BT UNION ARENA BOOSTER PACK INUYASHA [UE23BT]UNION ARENA ブースターパック 犬夜叉【UA50BT】 | 77 days later | Date confirmedSame product slug (iys-1) on JP and NA official sites; JP code UA50BT, EN code UE23BT. | Japanese EnglishChecked November 2, 2026 | ||
| EX14BT Macross series Vol.2 (translated title)UNION ARENA ブースターパック ｢マクロス｣シリーズ Vol.2【EX14BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 2, 2026 | |
| UA54BT / UE30BT UNION ARENA BOOSTER PACK Mushoku Tensei Jobless Reincarnation [UE30BT]UNION ARENA ブースターパック 無職転生 ～異世界行ったら本気だす～【UA54BT】 | 336 days later | Date confirmedSame product slug (mst-1) on JP and NA official sites; JP code UA54BT, EN code UE30BT. | Japanese EnglishChecked November 3, 2026 | ||
| UA55BT THE IDOLM@STER Cinderella Girls (translated title)UNION ARENA ブースターパック アイドルマスター シンデレラガールズ【UA55BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 2, 2026 | |
| UA56BT / UE26BT UNION ARENA BOOSTER PACK GURREN LAGANN [UE26BT]UNION ARENA ブースターパック 天元突破グレンラガン【UA56BT】 | 147 days later | Date confirmedSame product slug (ttg-1) on JP and NA official sites; JP code UA56BT, EN code UE26BT. | Japanese EnglishChecked November 3, 2026 | ||
| EX15BT / UEX08BT UNION ARENA BOOSTER PACK BLEACH: Thousand-Year Blood War Vol.3 [UEX08BT]UNION ARENA ブースターパック BLEACH 千年血戦篇 Vol.3【EX15BT】 | 63 days later | Date confirmedSame product slug (ex_blc-3) on JP and NA official sites; JP code EX15BT, EN code UEX08BT. | Japanese EnglishChecked November 3, 2026 | ||
| EX16BT Puella Magi Madoka Magica: Magia Exedra (translated title)UNION ARENA ブースターパック 魔法少女まどか☆マギカ Magia Exedra【EX16BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 2, 2026 | |
| UA57BT Steins;Gate (translated title)UNION ARENA ブースターパック シュタインズ・ゲート【UA57BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 2, 2026 | |
| UP01BT UNION ARENA PRECIOUS BOOSTER PACK GODDESS OF VICTORY: NIKKE [UP01BT] | — | — | Date confirmedEN-only row; JP has a separate Precious Booster (PC02BT, 2026-02-13, slug pc_nik) but the EN page does not state it is the counterpart. | EnglishChecked November 2, 2026 | |
| EX17BT Re:ZERO -Starting Life in Another World- Vol.2 (translated title)UNION ARENA ブースターパック Re:ゼロから始める異世界生活 Vol.2【EX17BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 2, 2026 | |
| EX18BT Monogatari Series Vol.2 (translated title)UNION ARENA ブースターパック 〈物語〉シリーズ Vol.2【EX18BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 3, 2026 | |
| UA58BT / UE28BT UNION ARENA BOOSTER PACK D.Gray-man [UE28BT]UNION ARENA ブースターパック D.Gray-man【UA58BT】 | 112 days later | Date confirmedSame product slug (dgm-1) on JP and NA official sites; JP code UA58BT, EN code UE28BT. | Japanese EnglishChecked November 3, 2026 | ||
| UA59BT / UE27BT UNION ARENA BOOSTER PACK Umamusume: Pretty Derby [UE27BT]UNION ARENA ブースターパック ウマ娘 プリティーダービー【UA59BT】 | 63 days later | Date confirmedSame product slug (upd-1) on JP and NA official sites; JP code UA59BT, EN code UE27BT. | Japanese EnglishChecked November 3, 2026 | ||
| UA60BT Ichigo 100% (translated title)UNION ARENA ブースターパック いちご100%【UA60BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 3, 2026 | |
| UA61BT The Irregular at Magic High School (translated title)UNION ARENA ブースターパック 魔法科高校の劣等生【UA61BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 3, 2026 | |
| UA62BT JoJo's Bizarre Adventure series (translated title)UNION ARENA ブースターパック 『ジョジョの奇妙な冒険』シリーズ【UA62BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 3, 2026 | |
| EX19BT The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You Vol.2 (translated title)UNION ARENA ブースターパック 君のことが大大大大大好きな100人の彼女 Vol.2【EX19BT】 | Not announced | — | Date confirmedJP-only so far; no EN product page listed on official NA site | JapaneseChecked November 3, 2026 |
For how Union Arena cards differ between the Japanese and English editions, see the Union Arena guides.
Change history
Dates are rechecked against the official pages twice a month. When a publisher moves a date or announces a new set, the change is recorded here.
- : Calendar published. Every date checked against the publishers’ official pages.