The Russian explorer noticed, as La Pérouse had done before him, that the deviation of the magnetic needle is but little noticeable in these latitudes.

The position of Sangar Strait, between Yezo and Niphon, being very uncertain, Kruzenstern resolved to determine it. The mouth, situated between Cape Sangar (N. lat. 41° 16' 30" and W. long. 219° 46') and Cape Nadiejeda (N. lat. 41° 25' 10", W. long. 219° 50' 30"), is only nine miles wide; whereas La Pérouse, who had relied, not upon personal observation but upon the map of the Dutchman Vries, speaks of it as ten miles across. Kruzenstern's was therefore an important rectification.

Kruzenstern did not actually enter this strait. He was anxious to verify the existence of a certain island, Karafonto, Tchoka, or Chicha by name, set down as between Yezo and Saghalien in a map which appeared at St. Petersburg in 1802, and was based on one brought to Russia by the Japanese Koday. He then surveyed a small portion of the coast of Yezo, naming the chief irregularities, and cast anchor near the southernmost promontory of the island, at the entrance to the Straits of La Pérouse.

Here he learnt from the Japanese that Saghalien and Karafonto were one and the same island.

On the 10th May, 1805, Kruzenstern landed at Yezo, and was surprised to find the season but little advanced. The trees were not yet in leaf, the snow still lay thick here and there, and the explorer had supposed that it was only at Archangel that the temperature would be so severe at this time of year. This phenomenon was to be explained later, when more was known as to the direction taken by the polar current, which, issuing from Behring Strait, washes the shores of Kamtchatka, the Kurile Islands, and Yezo.

During his short stay here and at Saghalien, Kruzenstern was able to make some observations on the Ainos, a race which probably occupied the whole of Yezo before the advent of the Japanese, from whom—at least from those who have been influenced by intercourse with China—they differ entirely.

Typical Ainos.
(Fac-simile of early engraving.)

"Their figure," says Kruzenstern, "dress, appearance, and their language, prove that they are the same people, as those of Saghalien; and the captain of the Castricum, when he missed the Straits of La Pérouse, might imagine, as well in Aniwa as in Alkys, that he was but in one island.... The Ainos are rather below the middle stature, being at the most five feet two or four inches high, of a dark, nearly black complexion, with a thick bushy beard, black rough hair, hanging straight down; and excepting in the beard they have the appearance of the Kamtschadales, only that their countenance is much more regular. The women are sufficiently ugly; their colour, which is equally dark, their coal black hair combed over their faces, blue painted lips, and tattooed hands, added to no remarkable cleanliness in their clothing, do not give them any great pretensions to loveliness.... However, I must do them the justice to say, that they are modest in the highest degree, and in this point form the completest contrast with the women of Nukahiva and of Otaheite.... The characteristic quality of an Aino is goodness of heart, which is expressed in the strongest manner in his countenance; and so far as we were enabled to observe their actions, they fully answered this expression.... The dress of the Ainos consists chiefly of the skins of tame dogs and seals; but I have seen some in a very different attire, which resembled the Parkis of the Kamtschadales, and is, properly speaking a white shirt worn over their other clothes. In Aniwa Bay they were all clad in furs; their boots were made of seal-skins, and in these likewise the women were invariably clothed."

After passing through the Straits of La Pérouse, Kruzenstern cast anchor in Aniwa Bay, off the island of Saghalien. Here fish was then so plentiful, that two Japanese firms alone employed 400 Ainos to catch and dry it. It is never taken in nets, but buckets are used at ebb-tide.