Alternative to SGOV at Interactive Brokers Japan?

Hi all. I was considering putting my emergency fund into SGOV in my account at Interactive Brokers Japan, but then realized they don't offer it. I was looking for alternatives on offer and I suppose the closest thing I've found is SHV. Does anyone have another recommendation for an ETF that would most closely mimic SGOV and is available at Interactive Brokers Japan? I guess keeping the fund in an ETF like this exposes me to exchange rate fluctuations, but unsure whether it's better to just keep the emergency fund sitting in a JP bank account doing nothing!

Thanks for any recommendations or advice!