I almost forgot to mention yes, this is the same candy drops featured in Studio Ghibli's movie 'Hotaru no Haka' 火垂るの墓 / 'Grave of the Fireflies' where 2 sibling orphans struggle to survive through WW2 in Japan. Little Setsuko's only luxury during that period was this candy. After she died her brother put her ashes into the tin. After he died, well the tin was thrown out by the trainstation cleaner. This is the most tragic animation I've ever seen, but one of my faves.
I remember having difficulty opening the lid too!
Characters read right to left.
Real life version, this is a modern reproduction, Sakuma also produced a commemorative design with Setsuko on it, picture from wikipedia.
There is another similar tin candy called Sakuma Drops but does not come with 'Shiki 式' in its title and is manufactured by 'サクマ製菓株式會社' instead of '佐久間製菓株式会社' both also read as Sakuma lol. Don't get confused now! See what I mean here.