No
No. Unlike the Samsung Galaxy S5, the Note 4 is not water resistant.
The Samsung Galaxy Note 4 is slated for a staggered worldwide release in October 2014.
Yes, the Samsung Galaxy Note 4 is a smartphone. It falls into the large phone, or "phablet" category.
The Samsung Galaxy Note 1 and Galaxy Note 2 have been phased out because they were replaced with the Galaxy Note 3. The Galaxy Note 4 is expected to be released in the Fall of 2014.
No, the Galaxy S4 is not waterproof. If you try putting it in water, it will most likely break. You might want to consider the Galaxy S4 Active, which is a more durable, and more importantly, waterproof version of the standard S4.
None of the Samsung devices released since the Samsung Galaxy S5 are waterproof. Although, the Samsung Galaxy Active line are water resistant.
no
I would say the Samsung Galaxy S5 is more water resistant than waterproof. It has an IP67 certification, which means it's dust resistant (the "6" part of that certification), and it's water resistant to 1 meter for 30 minutes (the "7" part of that certification).
No!
Yes, an unlocked Galaxy Bote 4 works in Japanese mobile network
According to some sources, the Galaxy Note 4 price (all in USD) ranges from $699 to $825 for the unlocked, depending on carrier. The price subsidized is expected to be $299.
N/a