This will be a long post, short answer is, they are welcomed. But it really depends on a myriad of situation, including how you got your wound, type of wounds, and when you got your wound.

After the Russo-Japanese war, there was a flood of veterans who had sustained injury and unable to function normally or have a normal job. That caused the Diet to pass laws to set up an organization Haiheien, translated to "Disabled soldiers facilities", these provide help to soldiers who sustained injury or disease during the course of their duty.

At the time of it's set-up, they catagorized different vets by the severity and type of injury, and had different treatment standards. Such as ones who lost one arm, to ones who are blinded. By the books, they are to be given one room, and they were free to pick up any hobbies they liked or work in the Weapons factory or the war museums. At the time of the set up they also had a poverty requirement, so only those that cannot afford it could go.

In 1934, they changed the system to Shouheien, "Injured Soldier's Facilities" and removed the poverty requirement, and expanded them. In 1938, they setup the new ministry of health and wellness, and changed the organization into "Military Protection Ministry", and placed them under the organization of the ministry of health and wellness.

They mainly divide their patients into 2 classes . Class 1 patients are those that.

1. Sustained injury, or disease because of their duty. (Combat injuries go here)
2. Got a disease that was specifically listed out in a law that allows them treatment:
3. Gunzoku (Civilians under the employment of the government) that sustained injury or disease during their course of duty, or those that have explicit written permission from their commanding officers.
4. Those that sustained the previous injuries or diseases that had symptoms happening again after they left.

To be a Class 1 patient, one would need to provide documents to prove themselves as one, such as their discharge papers (if available), active duty proof, injury event documents.

The remaining people who could not qualify are counted into class 2 patients, class 2 patients received much lower priority in treatment, and do not get a room.

These facilities also partnered with the veterans organization (Zaigougunjinkai, set up in 1910) in order to facilitate better awareness of the program.

On top of that, those that are wounded in combat would also receive a wound medal much like the purple heart today.

Normally, the Army or Navy Hospitals would do the initial treatment and then finally send the patients on their way to the Injured soldier facilities. They would usually, depending on severity of the injury also discharge the soldiers. (There are famous cases where they just went back and fought on regardless, like the famous pilot who flew his plane with one leg and an artificial one intercepting bombers till the end off the war)

Post-treatment these facilities mostly provide career options, even during the war, into career counseling centers. For example, there was a "Injured soldier teaching program" that was set up in the teacher's school that was specifically aimed at making injured soldiers teachers. This program continued into the end of the war.

Contrary to what popular notion of suiciding during the war, getting injured in combat and sent back to mainland wasn't really viewed as a taboo thing. Just like the main idea of Gyokusai (Shattering jade, various suicidal attacks) aren't really based on the idea that one should die, but rather to go ahead without concerns of death. That's a huge difference, one is attacking to die, one is attacking without thinking of the possibility of dying. "Gyokusai" was mostly about the latter.

However, that also doesn't mean there wasn't a taboo on certain things. One big thing is mental illness, unfortunately, I am not familiar with this area so I will refrain from talking about it. Another that is viewed not as good, are the ones that sustained injury not through combat but other situations.

However, in any case, there was a very robust medical and post-treatment system for injured soldiers of the time, and if one sustained combat injuries they really wouldn't be face with discrimination during the war.

Most of my info regarding treatment viability, views from others come from this collection of interviews of injured soldiers. Unfortunately, you are not able to view them online nor with subtitles. There are about 100 give or take interviews in here. Most of the problems of people not surviving on a lot of island combat was due to a lack of working logistical lines, not through lack of willingness to send them back home.