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Depth 300 m:
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______
Japan:|

Difficulty: 3/5
Time to beat: 1'42''00 (Taizo)
              1'45''00 (Susumu)
              1'45''00 (Anna)
              1'51''00 (Puchi)
              1'51''00 (Holinger-Z)
Bonus Miles: Clear Bonus: 400 m

Reverse difficulty: 5/5
Reverse time to beat: 1'20''00 (Taizo)
                      1'23''00 (Susumu)
                      1'23''00 (Anna)
                      1'29''00 (Puchi)
                      1'29''00 (Holinger-Z)
Bonus Miles: Clear Bonus: 700 m

So you've finally made it to the icing on the Time Attack cake. Japan is 
longer and more intricate than any other level and it contains nearly every 
element of the other courses but it definitely is possible to beat in no time.
1 m - 100m:
Drill down until you're standing on top of a big yellow block, move to the 
right and drill down into the big X-block tube. Move to its left end and get 
to its bottom where you have to quickly cross two gaps before the crystal 
blocks disappear.
Next you have to get under the right-most lone X-block and drill down until 
you're standing on the crystal block. Move beneath the other lone X-block and 
once again move down only stopping when you reach the crystal block. From 
here you have to move to the right in order to nab the clock, destroy the big 
blue block and jump into the small metal block-"can" waiting for the next 
clock to come down before you jump out again. Here you mustn't lose any time 
as otherwise the single metal block will either crush down on you or block 
your way.
Destroy the red, yellow, green and red block on your way down to the next 
item and to the end of this stage.
101 m - 200 m:
This section now (only the part featuring the crystal blocks) can't be easily 
described and probably I haven't found out the perfect way by now (or maybe I 
have but analyzing every possible path here is way too time-consuming and 
frustrating) but in my opinion you should alternate between column 3 and 4 
(counting from the left) until you've made it through the green-yellow-
section.
Then move right and down to the next clock, destroy the single yellow block 
and the huge blue block beneath you and the big yellow block covering the 
second clock of this section in order to nab it. Drill through the blue and 
the yellow block under your feet, grab the third clock, destroy the yellow 
block beneath you as well as the blue block and (who would've thought?) pick 
up the clock near-by. Now drill down before the big yellow block is affected 
by a chain-reaction until you're standing one row above the next clock (and 
two columns two the left), move one square to the right and after the blue 
blocks disappear you can safely grab the clock. Move a bit deeper and you 
will find the last clock of this stage.
201 m - 300 m:
First you simply have to pick up four clocks by following a path of big 
blocks between them. After that, move on to a big X-block with an opening on 
the far-right leading you to a small metal block-platform (and a clock) that 
you have to ride. Then destroy the red block, enter the second lift and 
repeat for the third lift.
The next long section plays a lot like China meaning that you'll encounter 
small areas surrounded by X-blocks that can be left by using flip- and turn-
blocks.
In the first are you need to destroy every normal block over and under the 
two single X-blocks (you may leave alone the green and the blue block on top 
of the left-most brown block) so you can grab the turn block. To speed up 
this part a bit you should only destroy the first normal block under an X-
block and then a block under the other one before drilling more blocks so 
both brown blocks start shaking (and thus indicate that they're about to fall 
down) nearly at the same time. When the area has turned by 90 degrees, 
destroy the green block beneath you so you don't get crushed.
Now destroy the big yellow block and the four differently coloured single 
blocks near the flip block, to make it reachable, and pick it up.
In the next section you should make sure not to drill down too far to the 
right. Instead move down in the third column (counting from the left) and 
pick up the crystal. If you don't do it as I told you, you are likely to get 
stuck next to the single X-block.
Now all you have to do to complete Time Attack Driller mode is collecting the 
flip block and move down to the end of the level (preferably near the centre 
because of the big blocks there).