Short answers, pulled from the story.
Inuyasha began its journey on the 13th of November 1996, when it debuted in Shogakukan's Weekly Shōnen Sunday magazine. The series ran for eleven years and seven months before concluding on the 18th of June 2008.
The story appeared as 558 individual chapters that were later collected into 56 tankōbon volumes. These volumes were released by Shogakukan starting from the 18th of April 1997, and finished with the final volume on the 18th of February 2009.
Teruo Sato directed the first season while Masakazu Hishida took over for the second. Character designs were handled by Rumiko Takahashi herself with writer Katsuyuki Sumisawa returning from the main series.
The series won the 47th Shogakukan Manga Award in 2002 within the shōnen category. It was also selected as one of the Jury Recommended Works at both the fifth Japan Media Arts Festival in 2001 and the twelfth installment in 2008.
By February 2010, Inuyasha had circulated more than 45 million copies worldwide. That number grew to over 50 million copies by September 2020 making it one of the best-selling manga series ever produced.