The Uozu bay area in Toyama, Japan had been historically submerged by sea-level rise, and appeared again by following sedimentation such as sand gravel and peat. A bogwood sample （Uozu bogwood） of Cryptomeria japonica from there, dated at 1361 ± 33 － 1481 ± 31 yBP by ¹⁴C method, was chemically analyzed. The woody components such as holocellulose and lignin are almost same as those of extant wood. Partially changing by diagenesis, most sesquiterpene compounds of essential oils from extant wood still remained in Uozu bogwood. Those suggest that the maturation of Uozu bogwood is low, and the absorbed sea-water had little effect on the organic chemical components. Sodium was detected in ash by field emission-type scanning electron microscopy/energy dispersive X-ray spectroscopy（ FE-SEM/EDX）. That is regarded as a suggestive evidence of the absorbed sea-water in historically submerged Uozu bogwood. By comparing with other inland bogwoods of same species, the relation between ¹⁴C age and the maturation calculated from the composition of sesquiterpene and diterpene compounds which are characteristic in the bogwoods was discussed. Uozu bogwood appears to have close correlation with Abu bogwood from Yamaguchi （¹⁴C age：2950 ± 70 yBP） and Wakasa bogwood from Fukui （¹⁴C age：6180 ± 60 yBP）

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Forty-three types of wood preservative semi-transparent coatings （6 water-borne, two colors each；15 solvent-borne, two colors each；and 1 solvent-borne, one color only） commercially available in 2009 were applied on sugi（Cryptomeria japonica D. Don） heartwood specimens, then exposed to natural weathering （45° inclination facing south in Tsukuba, Japan） for 4 years. Evaluation of the weatherability of these samples revealed that the water repellency index was more than 80％, the level defined as the measure of refinishing, for all samples after 12 months of natural weathering, but 19 of 43 samples dropped below 80％ between 12 to 24 months. Penetrating and semi-film-forming coatings showed similar tendencies both in their decrease in water repellency index and in the morphology of their deterioration. Statistical analysis indicated that color differences were greater for light coatings than for dark coatings. Moreover, it was found that changes in the color and water repellency index of coatings purchased in 2009 tended to be smaller than those of coatings purchased in 2004.

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Non-woven fabrics with clothianidin（TakelockTMNW）has been developed. A physical barrier of the original non-woven fabrics against termites was evaluated in laboratory studies and the termiticidal activity of TakelockTMNW was evaluated in laboratory and field studies. TakelockTMNW can effectively prevent and exterminate termites because it extends the contact time between termites and clothianidin due to its fiber structure that makes termites lose their balance. Also, TakelockTMNW can be easily spread, cut and connected together like cloth and can be used to plug in a hole like a sponge. Moreover, TakelockTMNW is allowed to be fixed by cement because clothianidin on TakelockTMNW is microcapsulated and has alkali resistance.

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