It is true that you can notice many kinds of auxiliary numerals being used in the book, 日本書紀(Nihonsyoki), and particularly noteworthy is the fact that there are several cases of using two or more auxiliary numerals counting the same object in the book. In the paper, both 「소(sou)」and 「隻(seki)」work in exactly the same way on counting the same object "ship", and the examples of counting the same object are mostly seen in the articles of foreign relations. So, we can see that there is a distinct difference in using the numerals among in each volume, practical use of the ship and the ownership of the ship in this paper, Therefore, we can conclude that there are some differences among their meanings in every volume, and practical use of the ship and the ownership of the ship. We can usually draw a line between the volume 18 and 19 when we try to differentiate their meanings in each volume. By the volume 19 in the book, 「소(sou)」 is used for counting on the boat, and 「隻(seki)」counting on birds or arrows. But After the volume 19,「隻(seki)」is also used for counting on the boat. In the book, 「소(sou)」is used from volume 9 to volume 30, and 「隻(seki)」is only used from volume 19 to volume 28. So we can find out that there is a distinct difference of using between 「소(sou)」and 「隻(seki)」in each volume. In the use of ship, most are seen in the articles of foreign relations, and 「소(sou)」 and 「隻(seki)」are both also written in expressing the ships for both gift and return. But we need a slightly different approach for the use of them as 「소(sou)」is used for counting on the ships for munitions and ambassador reception, and 「隻(seki)」is on the ships for the aid, manufacturing, transport, offerings, and on-boarding. But the usage of their meanings seems to be redundant in counting on the ship for gift and return. In fact, 「소(sou)」and 「隻(seki)」are not used for the same mix of volumes. 「소(sou)」is used for counting on both the ship for Silla`s and Japan`s, while 「隻(seki)」is used for counting on the Japanese ship only.