Like January, February is a good time for visiting Japan as the weather is usually sunny and dry and sightseeing spots are not crowded. The downside of a visit in winter are the relatively short days (sunset is around 5:30pm in Tokyo) and the vegetation's barren state.
1 A healthy person drinking approximately 2 liters of water per day makes 800 to 2000 ml of urine per 24 hours (4).  If the urinary system is healthy, the bladder can hold up to 16 ounces (2 cups) of urine comfortably for 2 to 5 hours (5).
But, if youâre eating while drinking the water, you may have to wait upwards of 45 minutes before the water is passed into the intestines because the stomach must digest the food first. Overall, on average, it takes from 5 minutes to a total of 120 minutes for water to fully absorb into your bloodstream from the time of drinking.