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Scientific Profile and Citation Metrics

Shinji Kasai's career (active since ~1990) centers on the molecular mechanisms of insecticide resistance in disease vectors. OpenAlex identifies ~192 works with ~5,682 citations and h-index 42; Semantic Scholar-style metrics list h-index 37, 4,944 citations across 128 papers — a discrepancy typical of database splitting/merging, so treat ranges rather than point values as reliable. Peak citation years (2010-2011, ~936/yr) and 2014 (~952/yr) coincide with his most influential first- and co-authored works: the house fly genome House fly genome paper (310+ citations) and the Aedes aegypti pyrethroid-resistance mechanisms paper Aedes aegypti pyrethroid resistance mechanisms (255+ citations).

Figure: OpenAlex reported citation counts by year; 2023-2026 values (28, 38, 79, 4) lag due to indexing delay and should not be read as declining impact.

Domain of Influence

His portfolio spans five decades of vectors and mechanisms: kdr mutations in Aedes, Culex, head lice, and sandflies; CYP9M10 duplication/cis-regulatory evolution in Culex quinquefasciatus; house fly Vssc alleles; and CRISPR/TALEN-based causal tests of CYP9M10 in resistance P450 pyrethroid resistance review (2004). His 2019 management review on Aedes vector resistance is among the field's standard references (374 citations) Aedes resistance management review (374 citations).

Current Work: Community Ecology Extension (2026)

His recent work extends beyond molecular toxicology into vector community ecology. The 2026 study used 16 species, 367 occurrence sites (1 km) and 193 (10 km) over a 10-year Japan survey (2013-2022), with Maxent SDMs (AUC 0.834-0.998) and PGLMMs. Environmental filtering dominated: non-phylogenetic species variance (2.316) dwarfed the phylogenetic component (0.027), and species-specific slope variances for sheep density (2.115), elevation, and human population far exceeded phylogenetic components 2026 decoupling of ecology from phylogeny in vector mosquitoes. This is rigorous, data-rich, well-powered for its scope, but correlational — occurrence data cannot separate plasticity from adaptation, and the COI-only phylogeny limits phylogenetic inference (acknowledged by the authors).

Critical Assessment and Blindspots

• Strengths: consistent methodological evolution (biochemistry → genomics → gene editing → statistical community ecology); high reproducibility orientation (public data/code: doi 10.57760/sciencedb.0122l); clear reported effect sizes with uncertainty (95% credible intervals, e.g., solar-panel land cover coefficient 1.462, CI [0.151, 2.774]) Reported fixed-effect coefficients with credible intervals.
• Weaknesses/blindspots: resistance literature is strain-based (specific lab strains may not generalize to wild populations); the 2026 ecology paper is Japan-specific, COI-phylogeny-limited, and lacks functional traits or direct host-preference data; several output items are conference proceedings or drill reports of lower scientific weight, inflating work counts without proportional citation impact.

Verdict: an established, high-impact specialist (h-index ~37-42) whose molecular resistance work is field-defining, now credibly pivoting into quantitative community ecology with appropriately disclosed limitations. Confidence: moderate-high on metrics (database discrepancy), high on research content (full-text evidence available).

 BGPT Author Review

Scientific Quality

Sustained 35+ year output with multiple field-defining papers (house fly genome, Aedes resistance mechanisms, kdr discovery in Ae. albopictus), h-index ~37-42, and demonstrated causal-testing capability (CRISPR/TALEN). Recent community-ecology work is well-powered but correlational and COI-phylogeny-limited. Some output padding via proceedings/drill reports. Strong overall, not paradigm-shifting beyond his specialty.

Communication Quality

Papers report effect sizes, CIs, and model details transparently; data/code shared publicly. However, work spans specialized venues and some Japanese-language reports, limiting accessibility to global audiences.

Author Novelty

First discoveries (kdr in Ae. albopictus, novel Vssc alleles, CYP9M10 duplication history) were genuinely novel; the 2026 ecological decoupling question is timely. Molecular resistance work is incremental within an established framework rather than conceptually disruptive.

Scientific Rigor

Consistent use of appropriate models (PGLMM, WAIC, Maxent with omission-rate validation), reported uncertainty, and causal gene-editing tests. Limitations: COI-only phylogeny, strain-specific resistance studies, correlational occurrence data, and no functional trait or plasticity-adaptation discrimination.