NHK used to buy time on an American Spanish language channel way back. I watched the entire series back then.
In the early 2000's, I was dating a japanese woman and asked her to contact NHK to purchase the series in VHS format. They quoted me a price well over $1000 for a non-subtitled version. Not being fluent in Japanese, this was unacceptable, not to mention the price.
I was told by NHK to contact the translation company. After so many years, I had & still have run into a dead end. I think NBC bought Univision, perhaps I should try them, I'm just shocked at the lack of response from google.
Totally awesome historical soap opera. Since Tokugawa killed off his line, it's understandable that modern Japanese historical sources portray him as a bumbling fool, but he conquered most of the clans, making it easy for Tokugawa to complete the process.