Description

Japanese scroll with calligraphy around a bridge and blooming irises. With box and extensive writing. Ink and mineral colors on paper. Post-humous work of Kenzan’s famous “Yatsuhashi”

Artist Ogata Kenzan (1663-1743) —
biographical information here: https://www.britannica.com/biography/Ogata-Kenzan

And the seal at the bottom left is:
深省
An online source says this is Shinshо̄, but Shinsei could also be possible
(and the bio link above mentions both)

As the link says:
His best-known works include…the Yatsuhashi (“Eight Bridges”),
a painting of a scenic attraction in Mikawa province (modern Aichi prefecture).

So, the image is well-known & has been designated a National Treasure & Important Cultural Property.
You can see it here: https://twitter.com/yamatanemuseum/status/307328444050583553
It looks almost the same, but not exactly identical.

Dimensions: Total size: 47 1/2″ high x 19 1/2″ wide (21 3/4″ wide including rollers). Size of art: 11″ high x 14 1/4″ wide