Your questions of 1 :1 board answered.
Q: Can I login to Global Website with my original Cherrykoko EN ID?
A: Existing Cherrykoko EN members can use same ID and PW to login to Global EN website. If you want to move to another language website, then please inquire us by email.
But, in this case, you need to be aware of that your purchase histories can not be transferred to Global CN, and JP. However, you can still find your purchase history through request on Q&A board or by e-mail.