Why can't Christians Verify Exactly Where Jesus Was Buried?

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If Jesus's tomb was the stage for the amazing events that happened after the supposed resurrection, how come nobody knows exactly where it is? 

If you Google "The Tomb of Jesus", you get this from Wiki; https://en.wikipedia.org/wiki/Tomb_of_Jesus

The tomb of Jesus may refer to any place where it is believed that Jesus was entombed.
Places that have been proposed as the location of such a tomb include:
Church of the Holy Sepulchre, Jerusalem
Garden Tomb, discovered in the 19th century outside the old city of Jerusalem
Talpiot Tomb, rock-cut tomb in the East Talpiot neighborhood, five kilometers south of the Old City in East Jerusalem
Roza Bal, the reputed tomb of Jesus in Kashmir
Kirisuto no haka in Shingō, Japan

Yep, that site in Japan is venerated today! Also from Wiki:

Tomb of Jesus Christ

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Crosses mark the graves. The cross on the right is the alleged grave of Jesus Christ.

Sign explaining the legend of the grave of Jesus Christ, in Japanese.

Shingō village is the location of what is purported to be the last [url=https://en.wikipedia.org/wiki/Grave]resting place of Jesus, located in the "Tomb of Jesus" (Kirisuto no haka), and the residence of Jesus' last descendants, the family of Sajiro Sawaguchi.[1] According to the Sawaguchi family's claims, Jesus Christ did not die on the cross at Golgotha. Instead his brother, Isukiri,[2] took his place on the cross, while Jesus fled across Siberia to Mutsu Province, in northern Japan. Once in Japan, he became arice farmer, married, and raised a family with three daughters near what is now Shingō. While in Japan, it is asserted that he traveled, learned, and eventually died at the age of 106. His body was exposed on a hilltop for four years. According to the customs of the time, Jesus' bones were collected, bundled, and buried in the mound purported to be the grave of Jesus Christ.[3][4]

Another mound near the alleged grave of Jesus is said to contain an ear of the brother of Jesus and a lock of hair from Mary, the mother of Jesus, the only relics of his family Jesus could carry when he fled Judaea.[5] The claims started in 1933 after the discovery of supposed "ancient Hebrew documents detailing Jesus' life and death in Japan" [6] that was supposedly the testament of Jesus. These documents were allegedly seized by the Japanese authorities and taken to Tokyo shortly before World War II and have not been seen since.[7]

The English text on the sign explaining the legend of the Tomb of Christ reads:

When Jesus Christ was 21 years old, he came to Japan and pursued knowledge of divinity for 12 years. He went back to Judea at age 33 and engaged in his mission. However, at that time, people in Judea would not accept Christ's preaching. Instead, they arrested him and tried to crucify him on a cross. His younger brother, Isukiri casually took Christ's place and ended his life on the cross.
Christ, who escaped the crucifixion, went through the ups and downs of travel, and again came to Japan. He settled right here in what is now called Herai Village, and died at the age of 106.
On this holy ground, there is dedicated a burial mound on the right to deify Christ, and a grave on the left to deify Isukiri.
The above description was given in a testament by Jesus Christ.

The most common rebuttal from Christians is, "Why would anyone think that an empty cave with no bones was important?" My point is that if Jesus of the Bible performed all those miracles that attracted thousands of loving followers, how come none of the followers or their families and friends ever note where it was? Surely after all that commotion it would be common knowledge where it should be?