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).
A: all water is excreted.if you drink for example ''100 units''60 will go when one urinates10 will go by sweating30 units will go into cells, and 30 will come out again and get excreted for example instools (feces) respiration (breathing)eventually all water is excreted (within about 48 hours) so water needs to be replaced constantly because we're going to lose water even if we do not drink it - thats why people dies after 48 - 72 hours of not drinking. hope that helps you