Daigoro:

Level 1 - Block Blow Go (Save 16 of 20)
  Two blockers at different locations to turn the crowd,
  one bomber to break through terrain, one bomber to
  turn the crowd.

Kozuka:

Level 2 - Luck (Save 8 of 10)
  It may be possible to save every lemming, but this is
  the most I have been able to save.

Level 3 - Advanced Blocking (Save 2 of 5)
  Two combined bombers to turn the crowd at one point,
  and a blocker to turn the crowd at another point.

Level 4 - Forgotten Dream (Save 49 of 50)
  At least one blocker is required while creating a
  safe landing place.

Level 9 - Muck (Save 115 of 200)
  It may be possible to save more lemmings, but this is
  the most I have been able to save. It is definately
  impossible to save every lemming.

Level 11 - Fuck (Save 26 of 30)
  Two blockers at different locations to turn the crowd,
  one bomber to break through terrain, one bomber to
  turn the crowd.

Level 16 - Icy Flame (Save 47 of 50)
  This is very different to the normal solution. Two break
  through the barrier, and one dies in an unsurvivable fall.
  Use stacked builds to hold the crowd back, and climbers
  are used to get workers out.

Level 19 - Short Level (Save 7 of 10)
  Two bombers are needed to turn one of the climbers, who
  in turn cannot be saved due to the lack of a floater and
  the time limit.

Wakizashi:

Level 2 - Eternal Fire (Save 39 of 40)
  One blocker, who must be bombed, is needed to turn the
  worker lemming around.

Level 5 - Interlocked (Save 4 of 5)
  One bomber is needed to free the two blockers.

Level 7 - Paradeath (Save 56 of 60)
  One blocker is needed to stop the lemmings from walking
  off an edge, one bomber is needed to contain the other
  lemmings, two lemmings die while building over the gap.

Level 9 - Lane of Lament (Save 19 of 20)
  One lemming must be bombed to allow the others to get past
  the trap.

Level 11 - Final Countdown (Save 68 of 80)
  Four bombers are needed to break through barriers. It also
  takes time to bridge the gap at the top, 13 is the fewest
  I have been able to lose.
  ***UPDATE***
  After trying a different method, I managed to save 68 of 80
  lemmings - two bombers break barriers, and 10 lemmings are
  lost during the time it takes to bridge the gap. It may be
  possible to save 69, but I doubt 70 or more is possible.

Level 14 - Where Are The Lemmings (Save 28 of 30)
  One bomber is needed to create a path, another is needed to
  create a pit to turn the final climber.

Level 15 - The Last Laugh (Save 72 of 80)
  Seven bombers are needed to create a path, one unrecoverable
  blocker is needed to turn the lemmings around.

Level 16 - The Left Or Right Puzzle (Save 35 of 40)
  Five bombers are needed to create a path.

Level 20 - This Way... (Save 70 of 80)
  10 bombers are needed to create a path. It may be possible
  with only 9, however I have not been able to do it.

Zanmato:

Level 1 - Lane of Lament (Save 19 of 20)
  Either one lemming is lost in the trap, or not enough skills
  are left over to save the final lemming. Your choice.

Level 2 - Survivors Will Be Shot Again (Save 69 of 70)
  I actually think this may be possible to save every lemming
  on, however I have not been able to find a way to do so. All
  ideas I have for solutions either are two slow or involve a
  bomber.

Level 4 - Copyright Infringement Part 2 (Save 158 of 160)
  One blocker is needed in the lower-right section, one bomber
  is needed in the upper-right section.

Level 11 - Down The Middle We Go (Save 76 of 80)
  Lemmings are lost while building across, the quickest I can
  do it is with three lemmings lost. One unrecoverable blocker
  is also required.

Level 12 - Zanmato 12 (Save 78 of 80)
  One unrecoverable blocker is used to stop a digger, one bomber
  is used to create a path.

Level 18 - Grounded (Save 26 of 30)
  Two bombers are needed to create holes in the wall, one
  blocker is needed to hold back the crowd, and another
  blocker is needed to turn the floaters around. There is
  no way to get rid of the blockers apart from by using
  bombers.

Level 19 - It's A Blast (Save 55 of 80)
  This is the fewest bombers I have been able to create a path
  with. It may be possible with slightly fewer. (This is done
  without using any blockers to hold lemmings back - all holding
  back is done by terrain and/or builders)