Abstract: Sugi woods treated with acetic acid aqueous solution were found to become lighter in weight.Treated and untreated sugi woods were carbonized at 400℃ to afford wood vinegar, wood tar and charcoal.Yield of wood vinegar from the pretreated wood was increased, but yields of wood tar and charcoal were decreased.Yields of wood vinegar and wood tar were almost constant, though yield of charcoal was slightly decreased with the increase of acetic acid aqueous solution concentration.Components in wood vinegar from the treated and untreated sugi woods were determined by capillary gas chromatography (capillary GC).Amounts of 2-furaldehyde and 5-hydroxymethyl2-furaldehyde in wood vinegar from the treated wood were increased, but amounts of carboxylic acids, phenols, pyrocatechol, guaiacols, and maltol were almost constant.Amount of 2-furaldehyde were increased with the increase of acetic acid aqueous solution concentration from 0 to 3%, and almost constant from 3% to 30%.

Key words: sugi(Cryptomeria japonica D.Don) wood, wood vinegar, carbonization, capillary gas chromatography(capillary GC)