ALC stands for Adventure Lab Cache and is a new type of cache that HQ is currently testing. There is a special app for this called Adventure Lab. This mystery cache is a bonus cache for the lab cache "Spirited Away 千と千尋の神隠し".
First, download the app and enter by either scanning the QR code or clicking the link below. Go to the 5 locations as directed, look for the clues and enter the answers. The cache's final location and the method to unlock the treasure is in the answers (journals).
or follow the URL link https://adventurelab.page.link/FvAq