Bonus Keys are special items that are given to you at random upon A-Rank clearing or higher a Featured Quest.
You can only receive one item per Featured Quest Ship wide and you're not always guaranteed a key.

Rarity Icon Item Name Drop Info Description
7
BonusKeySilverIcon.png ボーナスキー東京【銀】
Bonus Key Tokyo [Silver]
Random Featured Quest drop Quest Key with an expiration date.
Place in item bag to use at quest start.
Expires 168 hours from the time it was obtained.
7
BonusKeyGoldIcon.png ボーナスキー東京【金】
Bonus Key Tokyo [Gold]
Random Featured Quest drop Quest Key with an expiration date.
Place in item bag to use at quest start.
Expires 168 hours from the time it was obtained.
7
BonusKeySilverIcon.png ボーナスキー禍津【銀】
Bonus Key Magatsu [Silver]
Random Featured Quest drop Quest Key with an expiration date.
Place in item bag to use at quest start.
Expires 168 hours from the time it was obtained.
7
BonusKeyGoldIcon.png ボーナスキー禍津【金】
Bonus Key Magatsu [Gold]
Random Featured Quest drop Quest Key with an expiration date.
Place in item bag to use at quest start.
Expires 168 hours from the time it was obtained.
7
BonusKeyGoldIcon.png ボーナスキーラッピーF
Bonus Key Rappy Fever
Random Featured Quest drop Quest Key with an expiration date.
Place in item bag to use at quest start.
Expires 168 hours from the time it was obtained.
7
BonusKeyGoldIcon.png ボーナスキーカヅチ襲来
Bonus Key Kazuchi Assault
Random Featured Quest drop Quest Key with an expiration date.
Place in item bag to use at quest start.
Expires 168 hours from the time it was obtained.
7
ボーナスキー東京【虹】
Tokyo Bonus Key [Rainbow]
Not Implemented Quest Key with an expiration date.
Place in item bag to use at quest start.
Expires 168 hours from the time it was obtained.
7
ボーナスキー禍津【虹】
Magatsu Bonus Key [Rainbow]
Not Implemented Quest Key with an expiration date.
Place in item bag to use at quest start.
Expires 168 hours from the time it was obtained.