Dear Takashima San,
Thank you for helping us to coordinate the schedule.
In case that you may worry about Information Disclosure when we discuss in more detail, here I attached the NDA draft for your reference.
Could you be so kind to review it in advance?
If there is no problem with the content, could you please get it signed?
If there is anything needed to be amended, please just inform us.
With this NDA, we believe that both of us can share more helpful information to each other.