Here’s a ranking survey from goo Ranking the top thirty surprising product ideas in Japan. Please excuse me if my translation is not accurate.
1 Bras for men

2 Wigs for pets

3 Curry, stew, other food-flavored bath salts

4 Pen that can directly import handwriting into a computer (scanning pen)

5 Water-washable keyboard
6 Straw with water filter (Survival Water Filter Straw) enable you to drink water directly from pond.

7 Portable bum-washing toilet

8 Alarm clock that requires you to solve a puzzle to turn it off

9 Rounded keyboard

10 Banana case

11 Spoon with weight display (so you can know how much you eat exactly)

12 Watch-shaped video camera (8GB resolution:640×480)

13 Wheelchair for pets

14 Bubble-wrap sleeping bag

15 Alibi sound generating key chain
16 Slippers that make robot noises as you walk

17 Laser-guided scissors

18= Stockings that massage foot pressure points
18= Glowing wool

20 Bookmark with built-in timer
21= Pillow that can be used as emergency blanket
21= Thermometer spoon
23 Mouse, keyboard with built-in cooling fan
24 Calendar with bubble-wrap bubble for each day

25 Chopping board with built-in tray

26 Pillow with built-in alarm clock
(Vibrating pillow alarm clock buzzes you awake but doesn’t wake bedmate(s))

27 Camera that makes animal noises when you take a photo
28 Playing cards with jokes on them
29 Wristwatch with a display like railway signboard

30 Mop slippers

Men bras that is fag lol
Those pet wigs look great,I can imagine my pet cat in one of those,lol.