What's wrong with jetskis? It seems eminently reasonable to me.
The USA to Japan is even better, you only need to kayak to Hawaii for 2756 miles and then just a short hop of 3879 miles to Japan.
United States
1.Head
northeast toward
3900 Rd
0.1 mi
2.Turn
left at
3900 Rd
7.0 mi
3.Continue onto
S 10th St
2.3 mi
4.Turn
right at
W Chestnut St
0.2 mi
5.Turn
left at
US-75 N/N Pennsylvania AveContinue to follow US-75 N
9.4 mi
6.Turn
left to merge onto
US-400 W/US-75 N toward
Topeka/WichitaContinue to follow US-400 W
14.8 mi
7.At the roundabout, continue straight to stay on
US-400 W80.0 mi
8.Merge onto
KS-96 W via the ramp to
I-35/Hutchinson10.5 mi
9.Take the exit onto
I-135 N/KS-96 W toward
Salina/HutchinsonContinue to follow I-135 N
85.5 mi
10.Take exit
95B to merge onto
I-70 W toward
HaysEntering Colorado
410 mi
11.Take exit
289 toward
Colo Springs/Ft Collins0.2 mi
12.Keep
right at the fork to continue toward
E-470 N and merge onto
E-470 NPartial toll road
25.4 mi
13.Take exit
47 to merge onto
I-25 N toward
Ft CollinsPartial toll road
Entering Wyoming
80.5 mi
14.Take exit
8B to merge onto
I-80 W toward
LaramieEntering Utah
388 mi
15.Slight
right at
I-84 W (signs for
Ogden)Passing through Idaho
Entering Oregon
592 mi
16.Take exit
179 to merge onto
I-82 W toward
Umatilla/KennewickEntering Washington
142 mi
17.Continue onto
US-97 N1.3 mi
18.Merge onto
I-90 W100.0 mi
19.Take exit
10 to merge onto
I-405 N toward
Bellevue3.5 mi
20.Take exit
14 to merge onto
WA-520 W toward
Seattle6.0 mi
21.Take the
Montlake Blvd exit
0.5 mi
22.Merge onto
Montlake Blvd E0.3 mi
23.Slight
left at
NE Pacific St0.8 mi
24.Continue onto
NE Northlake Way0.1 mi
25.Turn
left at
6th Ave NE82 ft
26.Turn
right at
NE Northlake Way1.0 mi
27.Kayak across
the Pacific OceanEntering Hawaii
2,756 mi
28.Continue straight
0.1 mi
29.Turn
left at
Kuilima Dr0.5 mi
30.Take the 3rd
right onto
HI-83 W12.4 mi
31.Continue straight onto
HI-99 S/Kamehameha Hwy6.5 mi
32.Slight
left at
HI-80 S/Kamehameha HwyContinue to follow Kamehameha Hwy
2.1 mi
33.Take the ramp onto
I-H-2 S8.1 mi
34.Merge onto
I-H-1 E4.7 mi
35.Take exit
13B toward
Halawa Hts. Stadium0.3 mi
36.Merge onto
I-H-201 E4.1 mi
37.Merge onto
I-H-1 E4.1 mi
38.Take exit
23 for
Punahou St toward
Waikiki/Manoa0.2 mi
39.Turn
right at
Punahou St0.1 mi
40.Take the 1st
right onto
S Beretania St0.1 mi
41.Take the 1st
left onto
Kalakaua Ave1.9 mi
42.Kayak across
the Pacific OceanEntering Japan
3,879 mi
43.Turn
left toward
県道275号線
0.4 mi
44.Turn
left toward
県道275号線
361 ft
45.Turn
left toward
県道275号線
0.2 mi
46.Turn
right at
県道275号線
0.1 mi
47.Turn
left at
国道125号線
499 ft
48.Turn
right at
県道24号線
0.6 mi
49.Turn
left at
千束町(交差点) onto
国道354号線
2.0 mi
50.Turn
right at
中村陸橋下(交差点) to stay on
国道354号線
1.0 mi
51.Take the ramp to
常磐自動車道Toll road
0.3 mi
52.Keep
left at the fork, follow signs for
東京 and merge onto
常磐自動車道Toll road
23.8 mi
53.Take exit
三郷JCT toward
三郷出口・外環・松戸・大泉Toll road
0.2 mi
54.Keep
right at the fork, follow signs for
三郷西出口・外環・大泉Toll road
0.2 mi
55.Take exit
高速三郷IC on the
right toward
外環・大泉Toll road
0.7 mi
56.Merge onto
東京外環自動車道Toll road
17.3 mi
57.Take exit
高速大泉IC toward
関越道・新潟Toll road
0.9 mi
58.Merge onto
関越自動車道Toll road
47.7 mi
59.Take exit
藤岡JCT toward
上信越道・藤岡・長野Toll road
0.7 mi
60.Merge onto
上信越自動車道Toll road
54.3 mi
61.Take exit
高速東部湯の丸IC toward
県道81号線Toll road
387 ft
62.Take exit
東部湯の丸SA on the
right toward
東部湯の丸出口Toll road
0.6 mi
63.Merge onto
県道81号線
1.0 mi
64.Turn
right at
常田(交差点) onto
国道18号線
2.4 mi
65.Turn
left at
県道483号線
0.1 mi
66.Turn
right to stay on
県道483号線
272 ft
67.Turn
right to stay on
県道483号線
0.2 mi
68.Turn
left at
大屋駅前(交差点) onto
国道152号線
2.5 mi
69.Turn
right at
下丸子(交差点) to stay on
国道152号線
446 ft
70.Turn
left to stay on
国道152号線
7.2 mi
71.Continue onto
中山道/国道142号線
0.7 mi
72.Slight
left at
大和橋(交差点) onto
大門街道/国道152号線
1.7 mi
73.Slight
left
0.1 mi
74.Turn
left
0.5 mi
Japan