Kaei 7 (1853): Commodore Perry returned to Edo Bay to force Japanese agreement to the Treaty of Kanagawa; and the chief Japanese negotiator was Daigaku-no kami Hayashi Akira, who was known to the Americans as "Prince Commissioner Hayashi".

"Immediately, on signing and exchanging copies of the treaty, Commodore Perry presented the first commissioner, Prince Hayashi, with an American flag stating that this gift was the highest expression of national courtesy and friendship he could offer.
 The prince was deeply moved, and expressed his gratitude with evident feeling.
 The commodore next presented the other commissioners with gifts he had especially reserved for them.
 All business now having been concluded to the satisfaction of both delegations, the Japanese commissioners invited Perry and his officers to enjoy a feast and entertainment especially prepared for the celebration." –
from American eyewitness account of the event
Hayashi Noboru's signature can be found on the Japanese translation of the Dutch text of the agreement negotiated between Commodore Perry and Daigaku-no-kami Hayashi, implying some degree of participation in this historic negotiation.
Kaei 7 (1853): Commodore Perry returned to Edo Bay to force Japanese agreement to the Treaty of Kanagawa; and the chief Japanese negotiator was Daigaku-no kami Hayashi Akira, who was known to the Americans as "Prince Commissioner Hayashi".
"Immediately, on signing and exchanging copies of the treaty, Commodore Perry presented the first commissioner, Prince Hayashi, with an American flag stating that this gift was the highest expression of national courtesy and friendship he could offer.  The prince was deeply moved, and expressed his gratitude with evident feeling.  The commodore next presented the other commissioners with gifts he had especially reserved for them.  All business now having been concluded to the satisfaction of both delegations, the Japanese commissioners invited Perry and his officers to enjoy a feast and entertainment especially prepared for the celebration." – from American eyewitness account of the event
Hayashi Noboru's signature can be found on the Japanese translation of the Dutch text of the agreement negotiated between Commodore Perry and Daigaku-no-kami Hayashi, implying some degree of participation in this historic negotiation.
Hayashi Gakusai