vk.gy is database for visual kei.
Other artists are allowed under certain conditions.

The code has been published on GitHub.

Registration is free and more extensive editing rights can be requested.

According to footer the site exists since 2004 but wasn't launched until December 2017?! Site is ad-free and accepts donations via Patreon (granting various site perks and privileges like full-res images).

Exemplary mapping: 

Currently no pages are generated for events. Those are provided as a list only grouped by date and place.

Following information is based on observation and documentation without being a registered member:

• Some URLs contain numeric ID but others don't. Friendly names are always used for entities except for places.
• Numeric ID don't seem to change and can be used when editing on-site but it seems not possible to link them via URL.
• Places can be merged, it's unbeknownst to me how that will affect old URLs

Noteworthy about friendly URLs:

• Can be changed retroactively but only after the auto-generated one has been entered.
• Contain only numbers, letters and hyphens.

A common trait of databases specialized in a specific genre like vkgy is their tremendous amount of features and data. For the sake of not stuffing this ticket I won't mention them.