yoshiakihayashida/japan-energy-self-sufficiency

Japan Energy Self-Sufficiency — ANRE Fuel Decomposition + World Bank Comparator

Japan's energy self-sufficiency decomposed into fossil / renewable / nuclear contributions (資源エネルギー庁 総合エネルギー統計, 1990–2024), with Japan's ratio (ANRE) set beside World Bank peers on iso3 × year. Japan's number comes from the domestic ANRE source — not re-published World Bank data.

Why this exists

Most cross-country energy datasets stop at one self-sufficiency number per country per year. This adds the layer underneath it for Japan: the official ANRE decomposition into fossil, renewable/unutilized, and nuclear contributions, so a move in the headline ratio traces to a fuel. The 2011–2012 Fukushima shutdown is visible directly — nuclear's contribution falls 15.0% → 0.9% in a single year.

Tables

File	Grain	Layer
jpn_self_sufficiency_decomposition.csv	iso3, year, metric, value_pct	L0
jpn_primary_supply_by_fuel.csv	iso3, year, fuel, share_pct	L0
energy_self_sufficiency_jpn_vs_world.csv	iso3, country, year, self_sufficiency_pct, source	L1 (Japan = ANRE, peers = World Bank)

Notes on the data

• Two bases, don't compare line-for-line. jpn_primary_supply_by_fuel is on the HHV (gross) basis and is the total supply mix (imported + domestic, sums to 100%). jpn_self_sufficiency_decomposition is on the LHV / IEA basis and is domestic-only — the three _contribution metrics sum to self_sufficiency_lhv (nuclear counted as domestic). So a fuel's supply share ≠ its self-sufficiency contribution (fossil is ~81% of supply but ~0.9% of self-sufficiency — it's imported).
• In energy_self_sufficiency_jpn_vs_world, Japan appears twice (source = ANRE and World Bank) — the two differ by ~2 pp because the conventions differ; keeping both makes the gap visible. Filter source = 'World Bank WDI' for an apples-to-apples ranking.

Sample queries

-- Japan's decomposition around Fukushima
select year, metric, value_pct from jpn_self_sufficiency_decomposition
where year between 2009 and 2013 order by year, metric;

-- Japan vs peers on one basis, latest common year
select iso3, country, self_sufficiency_pct from energy_self_sufficiency_jpn_vs_world
where year = 2023 and source = 'World Bank WDI' order by self_sufficiency_pct desc;

License & attribution

Combined sources — see the LICENSE file for full terms. When reusing you must:

• 出典：資源エネルギー庁 総合エネルギー統計（e-Stat 経由取得）を加工して作成 (PDL 1.0 requires 出典表示 + 加工明記)
• Source: World Bank WDI (CC BY 4.0)