SuperH (also known as Renesas SH) is a collective name of several instruction sets (SH-1/SH-2/SH-2A/...), so it makes sense to double-check which one exactly needs to be emulated. Most samples should work just fine on the SH4 as these CPU cores are supposed to be upward-compatible. This architecture is not the top choice for both attackers or reverse engineers, so the range of available tools might be more limited. For static analysis, it makes sense to stick to solutions such as radare2, IDA, or ODA. Since IDA doesn't seem to provide remote GDB debugger functionality for this architecture, dynamic analysis has to be handled through QEMU and either radare2 or GDB, the same way as we described earlier:
If, for some reason, the binary emulation doesn't work properly, then it may make sense to obtain real hardware and perform debugging either there or remotely using the...