Souten no Ken (2006) is actually available to stream in high quality!
I just found out that we can stream Souten no Ken (2006) on Amazon Prime and these two websites. Apparently, you'll need a Japanese VPN to access them. I used the Urban VPN browser extension, and it worked.
Bandai Channel and U-NEXT both offer Episode 1 for free. For Bandai Channel, just connect to a Japanese VPN and stream normally. For U-NEXT, connect to a Japanese VPN to access the stream, then turn the VPN off as soon as the video starts loading, it should continue playing without any issues.
The video quality is insanely good (720p - 1080p), especially compared to the old HnG (Hokuto no Gun) release.
Hopefully someone can make a proper WEBRip or, even better, a WEB-DL from these streams to preserve the series in the best quality available.
And the stream links:
Amazon: Prime Video: 蒼天の拳
Bandai Channel: 蒼天の拳 第1話| バンダイチャンネル｜最新作から不朽の名作までアニメ・特撮作品を配信中！
U-NEXT Japan: 再生 | U-NEXT
