The conference will be held in the morning. I'm not sure whether it's at 9 or 10 JST. Probably the latter.The answer is probably along the lines of: If you had to placate investors, what would be the best time to have them call you up and ask you questions about your business plan? I personally would guess mid-morning (9 or 10) or maybe early afternoon (right after lunch, when they're fed and happy). That equates to 8 or 9 EDT or noonish EDT.