You can see all the parts in the set.
These are for 2 cars (a lead car and an intermediate car).
The outside of the body is already painted.
In addition, there is a printed explanation.

Cut out the truck parts.
The four parts on the right are wheels.

Put the wheels on the lower truck parts.

Put the upper parts and the lower parts together.
You will have a pair of these units.

Cut out the floorboard part.

Put the truck units on the floorboard.
Watch out for the direction!

Put the relief parts on the floorboard.
Again, watch out for the direction!

These are couplers.

The left one is a "dummy coupler", which has no connecting function. It just looks like the real thing.

The right one is a "magnetic coupler", which is unique to B Train Shorty. Use this right one when you connect trains.

I put the dummy coupler and the magnetic coupler on the front and back, respectively.

Here, the chassis is complete!

Now, we are assembling body parts!

First, cut out the convex part called "block".Then, cut out the window parts.

Insert the block parts into the window parts. Note that the convex should be outside.

Next, cut out the roof part and put it on the window parts.Here again, we have to be careful about the direction!

If there is a gap between the roof and the window parts, put the window parts with a driver or some hardwood stick. Dont break the antennas!

Now, put the end panel to the roof/window unit.

Here you are!

Prepare the side panels. These panels are in a plastic bag, so you don't have to file them.

Checking the shapes of windows, put the side panels on the roof/window unit. It might be a little bit tight, or a little bit loose.

Be careful about the assembling order: first, end panel, and second, side panels. OK, now, we'll prepare the front part.

Before preparing the front part, be careful about the following.

With this E231 series, there is a skirt, which moves obstacles out of the rail, and we will put a skirt part on the front part.

However, this product includes TWO skirt parts, one of which is NOT used. Be careful!

Insert the skirt part into the front part. Since the skirt part is a little bit soft, be careful not to crack!

Put the front part (with the skirt) on the body part.

Here, the body is complete!

Let's put the body and the chassis together!

If you have put the coupler on the chassis first, you need to let the coupler through the skirt part.

Since you could put the coupler on the chassis afterward, you don't have to worry about it too much.

You can see the result of putting the body and the chassis together. With four tabs, the chassis part is fastened to the body part.

Finally, we've finished a car!

We are now going to put the roof part on the window parts.

This time, we have a pantograph part, so we need to put it on the roof first.

Since the single-arm pantograph has a direction, again, be sure to check the instruction carefully.

These are end panels. Can you see the difference in shape?

Use the left one for the "pantograph end" and the right one for the other end.

This is the "pantograph end". You can see the pipe lines being connected.

And this is the other end. You can put the same end panels on an intermediate car that has no pantograph.

We are going to put the side parts on the roof/window unit, but again, there is a direction.

It's hard to tell which is the front, but the knack is to place the "door-cock cover" on the right, as indicated by the arrow. In other words, it should be on the opposite side of the pantograph.

As we have said above, B Train Shorty has a "dummy coupler" and a "magnetic coupler". In this picture, you can see the dummy coupler on the lead car and the magnetic coupler on the intermediate car.

When you use the magnetic couplers, be careful about the magnet's poles!

There is another coupler called "drawbar", which is used to connect two cars fixedly.

If you want to display the train being connected, it's better to use the drawbar since it looks like the real thing.

Cut out the destination board sticker with a cutter knife and put it where it should be. This time, I chose "Chiba".

Put the "Kuha E231-1" sticker on the side of the body. This sign indicates the model name and the manufacturing number.

Please refer to the construction diagram!

With one package, you can have a lead car and an intermediate car. With one more package, you can have a basic 4-car train!