Question : How long are most people's visits to Osaka when they fly in from Amsterdam?
Answer : Of course you're not most people, but if you were, you'd stay roughly 15 days.
Question : Is price more important than specific travel days for you?
Answer : In December, Saturday is your cheapest day to fly. Being flexible with your travel days garners you even more savings during your booking.
Question : Best case scenario, how quickly can someone get to KIX from AMS?
Answer : The quickest direct flight is 9 hours and 55 minutes via KLM. If you catch the 2:40 PM CET departure, you'll arrive at 8:35 AM JST (remember, there is an eight-hour time difference).
Question : For AMS to KIX, how many departure times are there on a given day?
Answer : On average, there are two options. The average route has 31 different flight times per day, so expect fewer options than you're used to.
Question : Do some days of the week have more flight times than others?
Answer : The day with the most departure times for this route is Wednesday with 14 options. Note that Thursday and Friday offer the least number of options with 10 flight times.