Sharp doesn't allow you to unlock your bootloader and has Fastboot removed from their devices. If you want a Japanese-made phone, you're better off getting a Sony.
While not being mentioned on Hikari's website asides from the "supported devices" list, the Z3, Aquos S2/C10, Aquos S3/D10 and Aquos S3 Mini can request unlocking using Hikari Calyx's unofficial service, under the Nokia/HMD unlock despite the two companies being unrelated: [hikaricalyx.com][hikari-service]
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Authored by [Ivy / Lost-Entrepreneur439](https://github.com/Lost-Entrepreneur439).<br/>