[okayama]

1st scramble: L2 F' U2 F2 L2 U2 R2 F U2 B' F2 D2 F' R F L2 F2 R B L2 F2
1st solution (1-hour): B2 F U2 B R' L' B2 L' B' R B' R' B2 R B R' B R' F' R B2 R' F U2 F' U2 F (27 moves)

Spoiler (Click to View)

20 min backup solution.

NISS solve.

(Normal)
2x2x1 block: B2 F U2
2x2x2 block: B R'
2x2x3 block: L' B2 L'

(Inverse)
Pre-scramble: L B2 L R B' U2 F' B2

F2L minus 1 slot: F' U2 F U2 R *
All but 3 corners: B R B' R' B2 R B R' B
Correction: L B2 L R B' U2 F' B2

Insert at *: R' F' R B2 R' F R B2

Amazing scramble, EO is already corrected (reduced to {U2, D2, L, R, F, B} group),
but I couldn't take full advantage of that.

2nd scramble: D2 L U2 B2 R B2 R D2 L F2 U2 R D B F2 U L' D2 F2 R D
2nd solution (1-hour): F D' B Lw2 B' D B Lw2 B2 D F B' R2 F L2 F' D' L' B' L' B L' B L' B' D2 U2 R B U2 B' (31 moves)

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(Inverse)
Pre-scramble: R2 B2 F2

1st square: (ready)
2nd square: B U2 B'
Pseudo 2x2x3 block: R' U2 D2
Pseudo F2L minus 1 slot: B L B'
EO + Clean F2L minus 1 slot: L B' L B L D
All but 2c2e: F L2 F'
Correction: R2 B2 F2
Swap 2c2e: F' B (D' B2 Lw2 B' D' B Lw2 B' D B') B F'

On inverse, D2 B F2 R' D R' L B2 with premove U' was also interesting, but I couldn't find any good continuation.