Secret History
As the 21st head of the Ban clan, a line of ninjas that can trace its history back some 500 years, Kawakami is considered by some to be the last living guardian of Japan's secret spies.
"I think I'm called (the last ninja) as there is probably no other person who learned all the skills that were directly" handed down from ninja masters over the last five centuries, he said.
"Ninjas proper no longer exist," he said as he demonstrated the tools and techniques used in espionage and sabotage by men fighting for their samurai lords in the feudal Japan of yesteryear.
The layered glass artwork Seated Woman with Red Hat was created in the 1950s, and was misplaced and kept in storage by the museum since 1963 due to an attribution mistake.
"Now that we have a full understanding of the requirements and additional expenses to display, secure, preserve and insure the piece, it is clear those additional costs would place a prohibitive financial burden on the museum," the Evansville Courier & Press quoted R. Steven Krohn, the president of the museum's board of trustees as saying.
The work will be sold through a private New York auction house within six months.
The piece is one of around 50 similar creations by Picasso. He is believed to have produced the glassworks between 1954 and 1956, while he was living in France.

The fossil comes from a branch of reptiles described as mammal-like as they are thought to be the ancient ancestors of modern mammal species.
A family and their dog named Kitty have stumbled upon one of the most significant fossil finds ever in Nova Scotia.
The reptile fossil, affectionately nicknamed "Superstar," is the first of its kind to be found in the province.
While out walking along Nova Scotia's fossil-rich Northumberland shore, Patrick Keating, his family, and their dog, Kitty, found a fossilized rib cage, backbone and partial sail.
When they went back to the same area a week later, they found the creature's fossilized skull.

Even though they number in the thousands, each terracotta soldier has painstakingly detailed armor, facial features, hair and clothing.
The answers to a number of historical mysteries may lie buried inside that tomb, but whether modern people will ever see inside this mausoleum depends not just on the Chinese government, but on science.
"The big hill, where the emperor is buried - nobody's been in there," said archaeologist Kristin Romey, curatorial consultant for the Terracotta Warrior exhibition at New York City's Discovery Times Square. "Partly it's out of respect for the elders, but they also realize that nobody in the world right now has the technology to properly go in and excavate it."
The Terracotta Warrior exhibition, featuring artifacts from the Qin dynasty and nine life-size statues from the extended burial complex built for Qin Shi Huang, is on display through Aug. 26. [Photos: Terracotta Warriors Protect Secret Tomb]

The US team discovered Scott's ship while testing sonar equipment. This sonar image shows part of the wreck on the sea bed.
One of the scientists noticed an unidentified feature during sonar mapping of the sea bed. Team members then noted that the 57m length of the feature matched the reported length of the Terra Nova. Researchers then sent a remote camera called Shrimp to film the wreck. Camera tows across the top of the target showed the remains of a wooden wreck lying on the seabed. Footage from the Shrimp also identified a funnel lying next to the ship.
Additional images
Dr Oltean explained: "It is not a Roman town, but a native village which may have been in existence before the Roman period. However, it traded actively with the Romans, shown by the initial collection of coins found and the ornate pottery, usually found near large cities and military camps and not in villages where most people would have used basic wooden bowls. The uniqueness of this Romano-British settlement is shown in the level of coins and types of pottery found, indicating that an exchange in goods and money was happening in the area, on a much larger scale than known in other villages in Britain at this period of time."

Scientists have challenged the theory that humanity's ancestors interbred with Neanderthals.
Over the last two years, several studies have suggested that Homo sapiens got it on with Neanderthals, an enigmatic hominid who lived in parts of Europe, Central Asia and the Middle East for up to 300,000 years but vanished 30-40,000 years ago.
The evidence for this comes from fossil DNA, which shows that on average Eurasians and Asians share between 1 per cent and 4 per cent of their DNA with Neanderthals, but Africans almost none.
But a new study by scientists at Britain's University of Cambridge says the shared DNA came from a shared ancestor, not from "hybridisation" or reproduction between the two hominid species.

Meave Leakey (left) with Cyprian Nyete (right) and other members of the field crew reconstructing pieces of specimen KNM-ER 60000 at the field camp in 2009.
KFRP's fieldwork was facilitated by the Turkana Basin Institute (TBI), and supported by the National Geographic Society, which has funded the KFRP since 1968.
Four decades ago, the KFRP discovered the enigmatic fossil known as KNM-ER 1470 (or "1470" for short). This skull, readily distinguished by its large brain size and long flat face, ignited a longstanding debate about just how many different species of early Homo lived alongside Homo erectus during the Pleistocene epoch.
Now Dr. Ran Barkai of Tel Aviv University's Department of Archaeology and Ancient Near Eastern Civilizations has shed new light on this milestone in human evolution, demonstrating a direct connection between the development of an agricultural society and the development of woodworking tools.
"Intensive woodworking and tree-felling was a phenomenon that only appeared with the onset of the major changes in human life, including the transition to agriculture and permanent villages," says Dr. Barkai, whose research was published in the journal PLoS One. Prior to the Neolithic period, there is no evidence of tools that were powerful enough to cut and carve wood, let alone fell trees. But new archaeological evidence suggests that as the Neolithic age progressed, sophisticated carpentry developed alongside agriculture.
Recent advances in paleogenetics are providing never-before-seen glimpses into the complex evolution of humans in Europe, helping researchers piece together the events that ultimately created what is now known as modern man. Following the period when ice sheets were at their maximum extension across the earth (between 27,000 and 16,000 years ago), hunter-gatherer populations re-colonized most parts of Europe. Then around 8,000 years ago, the first farming populations appeared on the continent during the so-called Neolithic transition. For several thousand years, two separate modes of life coexisted in Europe: hunter-gatherer populations continued to rely on wild food resources, while farming populations had an entirely different demographic profile and lifestyle that consisted of domesticated crops and livestock, pottery, housing, and storage technology.