In 1925 Dr. Ueno died from a brain disease, called Cerebral Hemorrhage.

https://en.japantravel.com/tokyo/hachiko-statue-university-of-tokyo/20013

On March 15 1935 Hachiko passed away.

https://en.japantravel.com/tokyo/hachiko-statue-university-of-tokyo/20013

Hachiko’s nickname Hachi means eight in Japanese

https://www.bbc.com/news/world-asia-65259426

en.japantravel.com/tokyo/hachiko-statue-in-shibuya/44644

Hachiko's fur was kept and stuffed to be put on display at a museum.

There is a Hachiko family mural on the wall of the station opposite to where the original statue was.

In 2009 a movie was made called Hachi and it was an English remake of the story.

   https://nerdnomads.com/hachiko_the_dog

Professor Eizaburo Ueno of Tokyo University adopted Hachiko in Akita prefecture in the early 1920s.

https://en.japantravel.com/tokyo/hachiko-statue-in-shibuya/44644

There are stories of him being beaten and bullied by pedestrians, the staff at the train station, and also children. :(

https://nerdnomads.com/hachiko_the_dog

In 1935 after Hachiko died he was buried next to his owner Dr. Ueno, who'd died nearly ten years earlier in 1925 from a cerebral hemorrhage. A gravestone Hachiko still stands today in Aoyama Cemetery right next to Dr. Ueno's.Source:https://www.nippon.com/en/japan-glances/jg00137/

Hachiko was born in Ōdate, Akita Prefecture which is around 600 kilometers (around 373 miles) from Shibuya and belonged to a farmer named Saitō Yoshikazu. His breed is the Akita-inu which is Japan's most famous dog breed.

Source: https://www.nippon.com/en/japan-glances/jg00137/

Hachiko died because of suffering an infection of parasitic worms, he weakened, dying on March 8, aged 13 (He was 90 in human years). His funeral was held on March 12. Then his pelt (fur) was preserved and mounted, and is displayed at the National Science Museum of Japan in Ueno, Tokyo.

Source: https://vickiwongandhachi.com/hachis-wait-begins-hachiko-snapshot-10-the-truth-behind-the-myths/

In March 2011 doctors soon came to the conclusion on how Hachiko. They found that Hachiko had been suffering from chronic heart worms (dirofilariasis), which had seriously damaged his heart and lungs. They also found fluid accumulation in the peritoneal cavity (ascites), a complication of heart worms.

Source: https://vickiwongandhachi.com/death-of-hachi-ko-the-loyal-akita-hachi-snapshot-16-the-truth-behind-the-myths/

Professor Ueno named his puppy Hachi, meaning the number eight in Japanese. Eight is a lucky number in Japan.

Hachi and his new owner soon became best friends. Professor Ueno loved his dear dog above all and treated him as his son. The two of them were inseparable. There are currently five Hachiko statues and monuments in Tokyo.
There is a statue of him in Rhode Island in the USA, where the American version of the film was made. You will find the American Hachiko Statue at the Woonsocket Depot Square (Rhode Island).

Source: https://nerdnomads.com/hachiko_the_dog#:~:text=Hachiko's%20fur%20was%20preserved%20to,Aoyama%20Cemetery%20in%20Minato%2C%20Tokyo.

Hachiko was a great known dog and we all wish that he is reunited with Dr. Ueno and his pals in the after life.🫶🇯🇵

During the wake for Dr.Ueno, Hachiko had smelled him from the house and entered the living room where it was, then crawled under the coffin that Dr.Ueno was in and refused to move.

https://www.bbc.com/news/world-asia-65259426

Dr.Ueno passed from a brain illness, called a Cerebral Hemorrhage, In 1925.https://www.bbc.com/news/world-asia-65259426

A whole lot of people gathered or raised 800,000 yen to build a statue for Hackiko.https://www.bbc.com/news/world-asia-65259426

Hachiko would wait for his owner, Dr. Ueno at the train station, but a couple years passed and Hachikos owner died, But Hachiko never gave up to find his owner but Scientist say that the dog died of filariasis or lung and heart cancer. some of his remains are buried in Aoyama cemetery, next to his owner’s grave. 

It talks about how Hachiko was born in November 1923,then how Hachiko died on March 8th 1935, and at Hachiko's funeral monks came and prayed for hachiko

Source:japaninside.com

On the source “japaninside” It says that “Beaten and Bullied: While he waited loyally at the station, Hachiko faced cruelty from pedestrians and even children who tormented him.” That means that people were very cruel to him at the station for no reason.

Source itsyourjapan.com

According to “itsyourjapan” Hachiko’s name is actually Hachi proof of this is on the website because it says “Ueno named his pup Hachi (ハチ) after the Japanese number for eight.” that is proof that Hachiko real name that Ueno gave him is really Hachi.