Sayonara Umihara Kawase lure model reel key holder
From UmiharaWiki
The Sayonara Umihara Kawase lure model reel key holder (さよなら海腹川背ルアー型リールキーホルダー) was a reward given to certain people, selected from a lottery, out of those who completed and sent to Agatsuma Entertainment a questionnaire that was included with physical copies of the 3DS version of Sayonara Umihara Kawase in the three months following the release of Sayonara.
