History of excavation works at Lake Nojiri

(dominical year)
ExcavationMajor topics and excavated artifacts
1948 Matsunosuke Kato found a cheek tooth (hot-water bottle fossil)
1961 Lakeside dispute Mr. Ijiri’s proposal:“Let’s start excavating anyway.”
19621st excavationFound fossils of a Naumann Elephant and an Irish elk
19632nd excavationConfirmation of the (last) Ice Age by radioactive age determination and analysis of pollens
19643rd excavationFound a flake of a palaeolith
19654th excavationFound a part of a head bone of a Naumann Elephant and a 8.5m long wood fossil
19735th excavationFound “Crescent and Star”, a knife-shaped stone artifact and a bone artifact An experts group was formed
19756th excavationFound a Venus statue (?) and a trace fossil The Nojiriko Association was formed
19761st on-land
Found a knife-shaped stone tool and a dry trace [Nakamachi]
19787th excavationFound a head bone of a Naumann Elephant and a fossil of an insect
19792nd on-land
Found a burial pit of a claw-patterned clay pot [Nakamachi]
19818th excavationFound a 2.4m long tusk, the oldest bone tool in Japan (bone scraper) and circumstantial evidences for a kill site
19823rd on-land
Excavated a lake shoreline of about 20,000 years old [Mukaishinden] and found a ridge-patterned clay pot [Nakamachi]
19849th excavationFound a spiral flake and a coprolite (?)
198710th excavationFound a bone cleaver (machete-shaped bone tool)
199011th excavationProved a fossil to be the footprint of a Naumann Elephant
199312th excavationFound a rib with line traces (traces of dissection?)
19947th on-land
Found a stone tool of the Upper Old Stone Age [Nakamachi]
199713th excavationFound a hammer stone and a bone of the upper arm of a Naumann Elephant
19988th on-land
A lot of stone tools of the Upper Old Stone Age were excavated [Nakamachi]
200014th excavationClosely observed the relationship between the fossils and the lamina*
Found a complete set of right and left cheek teeth of a Naumann Elephant
200315th excavationFound an ancient shoreline
200616th excavationFound a footprint fossil of a Cervus nippon
200817th excavationFound a fossil of an Alces alces
201018th excavationFound a hammer stone and a cutting tooth (tusk) of a Naumann Elephant
201219th excavationFound a cheek tooth of a Naumann Elephant and a flake
201420th excavationFound a radius of an Irish elk
201621st excavationFound a piece of an upper arm bone of an Irish elk

*Lamina: Means a pattern observed in geological layers, in which patterns are formed according to the way soil and sand accumulate on each other.