#date eri

I have a komon kimono and it has and extra collar sewn in under the normal one. I don't mean it is an open collar, I mean it looks like a han-eri flap is sewn in along the length of the collar.

Do you have any idea what it is for?

Hi! So glad you chose to explore kimono world with me for so long :D

From what I gather, what you describe could be a date-eri (decorative collar-strip mimicking layered-kimono look). It's often used with furisode and so a pretty uncommon feature for a komon kimono - but maybe past owner wanted to jazz it up!

It's put on like this (source):

Otherwise, this additional collar couuuuld be part of a 比翼 hiyoku (additional collar mimicking layered-kimono look). But it's pretty unlikely as those are usually a full fake layer (=also on skirt), and reserved for formal kimono (like tomesode, especially kurotomesode).

Hiyoku is the white strip you see by kurotomesode collar area. They are as large as normal kimono collar, and must be folded too when dressing:

Romantic rich purple furisode, with proud peacock nestled in candy-like hydrangeas, over a ground with running water and cranes in flight.

I have 2 lovely awase kimonos but it's unbearably hot where I am, so I was wondering if the nagajuban could be omitted entirely if a date-eri/kasane-eri is sewed on? Thanks in advance!

:D One-of-us-one-of-us :D (hi!)

Nothing forbids you to ditch juban!

In fact there is a term for that: 素袷 suawase (=wearing a lined kimono without an undergarment​).

To mimic the juban without actually wearing one, you would not use a dateeri but a another kimono item especially made to "fake" juban collar called an usotsuki-eri:

Tbh, I often use this trick, especially for indoors events where I know it will be (too) warm! I keep the hadajuban (or something similar like a slip), add a fake collar, and I am good to go.

Will that get a pass for formal events? no. Is it comfortable and allowing you to wear kimono in Western-heated-rooms? yes!

Now the thing is, if it's really really hot where you live, I would not advise wearing awase too often without proper foundation under it. Undergarments like juban are also there to protect kimono from sweat, so not wearing a juban could in the end damaged your kimono - especially if they are silk!

Koromogae (the change of clothes -lined/unlined- to better match the seasons) historically took place around April 1st in Japan. But it was not set in stone, and widely depended on where people lived!

If you can, dress accordingly for your climate :) I'd favor unlined hitoe (maybe you could alter your awase?), or even nice yukata dress-up as kimono.

This way you could still wear your kimono but with proper undergarments to protect them ;)

-Hi! I dont know the character so i hope I got the right pic!

Of what I see, she's wearing something inspired by classical outfits for martial sports (like kyudo, iaido, kendo etc) and meiji school uniform for girls.

She has a light pink kimono (probably unpatterned iromuji here, though training clothes called keikogi are usually easy to wash fabric and not silk like fancy kimono are), a juban underkimono, a dark hanhaba obi belt, and a dark pink hakama (girls usually wear andon-bakama/skirt type, I can't see if legs are separated in that case it will be a hakama-umanori/riding pant type).

The only fancy things she's got is a date-eri/kasane-eri (decorative collar, the small strip if darker pink by her collars). In some pictures, her hakama ties also look embroidered with sakura flowers (something pretty usual for fancy women hakama like those worn for seijin no hi).

The shoes are not unusual as boots have been worn with hakama by school girls since the early 20th century.