Japan Communications Inc. (JCI) agreed with Taisys Technologies Co. Ltd. on strategic partnership in developing and delivering Cold Wallet for cryptocurrency to smartphones. In designing FPoS (Fintech Platform over SIM), JCI adopted subSIM provided by Taisys, the patent holder and the leading maker of overlay SIM. FPoS has been already succeeded in Experiment by FSA's (Financial Service Agency, Japanese Government Authority of Financial Industry) FinTech Experiment Hub and it is now underway to commercial service launch. FPoS will bring security of internet banking to the level never been achieved before without compromising the ease of use. Use of subSIM makes FPoS possible to be applied to variety of applications. One application requested by the market is Cold Wallet, which is expected to be mandated by the government to secure the customer asset of cryptocurrency. This is in line with Japanese Government and FSA's promotion of cryptocurrency by establishing regulatory environment. JCI and Taisys will develop and deliver "my Cold Wallet" with world's highest security by a) Strict KYC process defined by and compliant with Digital Signature Act, b) Strong authentication of the user as has been proved by FSA Experiment Project, and c) cold wallet function secured by IC card in the form of overlay SIM.