This study examined the hypothesis that communicating with the weak ties promotes professional self-efficacy and work engagement, which mediates reflection of one's past career. As a preliminary survey, semi-structured interviews were conducted with incumbent employees and analyzed regarding career reflection arising from communication with weak ties. As part of this survey, Japanese employees (n = 340) were asked to respond to questionnaires that measured communication between weak ties, career reflection, professional self-efficacy, and work engagement. Factor analysis of the scores for career reflection extracted four factors: re-evaluation of own work styles, rebuilding of non-work activities, improvement of work autonomy, and evocation of work crisis awareness. Covariance structure analysis indicated that communication about work-related contents and expectations of the future with weak ties promoted the re-evaluation of the employees' own work styles, which was shown to promote professional self-efficacy and work engagement. These results support the original hypothesis and suggest that communicating with weak ties is an important resource for promoting positive change in employees' sense of work.

Then, by distillating with various reflux ratio in mulistage distillation column, COD value of the drain from the waste water of shochu could be decreased effectively with total reflux.

○永野惣一 1 ・藤 桂 2 (1 筑波大学大学院人間総合科学研究科・ 2 筑波大学人間系) キーワード：弱い紐帯，キャリア・リフレクション，仕事満足感 Good inspiration even between old friends; The longitudinal study of the effects of career reflection through communication with weak ties.

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