My research told me Japanese don't even know about this at all and here I am to help a lot who's willing to try this out.
These are bacon-wrapped water chestnuts, a popular appetizer often glazed with sweet chili sauce, soy sauce, or brown sugar.
They are typically made by wrapping half a slice of bacon around a canned water chestnut and securing it with a toothpick.
The dish is baked at 375°F (190°C) for approximately 30-40 minutes until the bacon is crispy and the glaze is caramelized.
I'm sure you're convinced to give this a try and see how sweet it is